Upset Over Sexual versus Emotional Infidelity Among Gay, Lesbian, Bisexual, and Heterosexual Adults

The Desirable Dad Hypothesis: Male Same-Sex Attraction as the Product of Selection for Paternal Care via Antagonistic Pleiotropy

Same-sex attraction, a heritable trait with a reproductive cost, lacks a comprehensive evolutionary explanation. Here we build on a hypothesis invoking antagonistic pleiotropy, which suggests that genes linked to male same-sex attraction remain in the gene pool because they have conferred some fitness advantage to heterosexual men possessing them. We posit the "desirable dad hypothesis," which proposes that alleles linked to male non-heterosexual orientations increase traits conducive to childcare; heterosexual men possessing same-sex attracted alleles are more desirable mating partners as a function of possessing superior paternal qualities. We conducted three studies to test predictions from this hypothesis. Results were consistent with all three predictions. Study 1 (N = 1632) showed that heterosexual men with same-sex attracted relatives were more feminine than men without, as indicated by self-report measures of femininity (η2 = .007), warmth (η2 = .002), and nurturance (η2 = .004 - .006). In Study 2 (N = 152), women rated feminine male profiles as more romantically appealing than masculine ones (d = 0.83)-but less so than profiles possessing a combination of feminine and masculine traits. In Study 3 (N = 153), women perceived feminine male profiles as depicting the best fathers and masculine profiles the worst (d = 1.56): consistent with the idea that femininity is attractive for childcare reasons. Together, these findings are consistent with the idea that sexual selection for male parental care may be involved in the evolution of male same-sex attraction.

Multidimensional Measurement of Attitudes Toward Consensual Non-Monogamy

Despite increased interest in consensual non-monogamy (CNM), significant stigma remains against CNM. Consequently, there is a need for scales to assess attitudes toward CNM. In response to this need we developed the Multidimensional Attitudes toward CNM Scale (MACS). Items were developed in consultation with content experts and data were collected from two samples at two different Canadian Universities. Fit indices of exploratory (Sample A) and confirmatory (Sample B) factor analysis suggested a 16-item scale with three underlying factors: CNM is Dysfunctional, CNM is Immoral, and CNM is Healthy and Satisfying. Validity analyses, conducted using the combined sample (n = 806; 79% women; 67% heterosexual), demonstrated that participants with higher MACS total scores (i.e. more negative attitudes) were less likely to have ever been involved in a CNM relationship and were more likely to report monogamy as their ideal relationship style. Higher MACS scores were also associated with more negative attitudes toward bisexuality and toward women, and higher scores on measures of homophobia and jealousy. In contrast, individuals with higher scores on the CNM is Healthy subscale tended to score higher on measures of empathy. The MACS demonstrates strong psychometric properties and can assist in better understanding attitudes toward CNM relationships in research and clinical settings.

Relationship status and gender-related differences in response to infidelity

Introduction

The sexual imagination hypothesis suggests that responses to a partner's infidelity emerge from the sociocultural factors that affect individuals' imagining of that occurrence irrespective of biological sex, including relationship status (i.e., the experience of a serious, committed relationship). Nevertheless, evolutionary psychological perspectives predict that responses to a partner's infidelity emerge from a sex-specific evolved innate mechanism.

Methods

A lower 2D:4D digit ratio is associated with more robust responses to a partner's sexual infidelity. In this study, participants (660 males and 912 females) were requested to measure finger lengths, reactions to their partners' sexual and emotional infidelity, and relationship status.

Results

A logistic regression and multiple regression analyses revealed that relationship status was uniquely associated with responses to a partner's sexual and emotional infidelity beyond the effects of sex and 2D:4D. Those in committed relationships were more upset or distressed over their partners' infidelity, particularly over sexual infidelity, than those not in committed relationships.

Discussion

The results supported the sexual imagination hypothesis indirectly, while evolutionary psychological perspectives were met with skepticism. Our findings implied that sex differences in jealousy result from relationship status, and that responses to partners' infidelity are more alike than different.

Infidelity in the Adolescence Stage: The Roles of Negative Affect, Hostility, and Psychological Well-Being

BACKGROUND

Infidelity is a relational process common in all types of romantic relationships and has been established as one of the main causes of relationship breakdown. However, little is known about this type of transgression in adolescent romantic relationships, although it manifests as a fairly frequent behavior involving different motivations. Even less is known about the emotional impact of infidelity on the offending person and its association with hostile behavior and psychological well-being.

METHODS

Through an experimental study (N = 301 Spanish adolescents (190 female and 111 male; M_age = 15.59, SD = 0.69; range from 15 to 17), we sought to analyze the effect of manipulating two types of motivations for infidelity (sexual vs. emotional dissatisfaction) on negative affect, hostility, and psychological well-being.

RESULTS

The main results revealed that committing infidelity motivated by hypothetical sexual (vs. emotional) dissatisfaction was indirectly related to lower psychological well-being through its effects on increased negative affect and hostility.

CONCLUSIONS

Last but not least, we discuss these findings, highlighting the possible implications of infidelity for the psychosocial and psychosexual development of adolescents.

Sexual Orientation and Infidelity-Related Behaviors on Social Media Sites

Little research has been focused on offline or online infidelity in GL dating relationships, especially in a post-communist socio-cultural context. Infidelity-related (IR) behaviors on social media sites might be as hurtful to relationships as offline infidelity, both in gay, lesbian (GL) and heterosexual romantic monogamous relationships. In this cross-sectional study, we aimed to examine the associations between dyadic satisfaction, attitudes toward infidelity, and problematic internet usage, with IR behaviors on social media sites among GL and heterosexual unmarried individuals in Romanian sexual minority communities. Results showed that GL respondents did not significantly differ from heterosexual participants regarding IR behaviors. Furthermore, we found the main effect of attitudes toward infidelity and problematic internet use on IR behaviors. Sexual orientation highlights the main effect of IR behaviors when analyzed with dyadic satisfaction. The current study may be a precursor to further research investigating correlations in online IR behavior among lesbian and gay individuals engaging in consensual nonmonogamy. Implications of the findings are discussed in the social context of a post-communist country where GL individuals may face discrimination and stigma because of their sexual orientation.

Jealousy Is Influenced by Sex of the Individual, Their Partner, and Their Rival

Jealousy is an affective state activated by a perceived threat to a valued relationship by a third party. On average, males report higher distress about their partner's sexual extra-pair involvement, while females show higher emotional jealousy. These sex differences are specific to heterosexuals and to contexts with potential reproductive costs. We tested the effect of sex and sexual orientation of the individual, and sex of the partner and potential rival on sexual versus emotional jealousy. Sexual orientation was operationalized as a willingness to form long-term relationships with men, women, or both. Heterosexual, homosexual, and bisexual males (N = 416) and females (N = 1328) from Brazil, Chile, and Portugal responded to the Sexual vs. Emotional Jealousy Scale and then ranked their distress to four hypothetical scenarios: sexual or emotional involvement of their partner with a male or a female rival. This is the first study to simultaneously test for an effect of self, partner, and rival sex on jealousy: bisexual individuals responded twice, about a hypothetical female and about a male partner. Individuals were most preoccupied with their partner's emotional relationship with a rival of the same sex as the respondent. Heterosexual males reported higher sexual jealousy than the other groups, but did not differ from bisexual men responding about female partners. Bisexual females were more upset by sexual extra-pair involvement of their female (versus male) partners with a male rival. Thus, jealousy was influenced by sex and sexual orientation of the individuals, sex of the partners, and also by sex of the rivals: same-sex rivals were perceived as most threatening. This suggests that besides being a strategy to maintain a primary relationship, jealousy is particularly sensitive to same-sex competitors, being an intra-sexual competition strategy.

Demographic and sociocultural predictors of sexuality-related body image and sexual frequency: The U.S. Body Project I

Body image is a critical component of an individual's sexual experiences. This makes it critical to identify demographic and sociocultural correlates of sexuality-related body image: the subjective feelings, cognitions, and evaluations related to one's body in the context of sexual experience. We examined how sexuality-related body image differed by gender, sexual orientation, race, age, and BMI. Four items assessing sexuality-related body image were completed by 11,620 U.S. adults: self-perceived sex appeal of their body, nude appearance satisfaction, and the extent to which they believed that body image positively or negatively affected their sexual enjoyment and feelings of sexual acceptability as a partner. Men reported slightly less nude appearance dissatisfaction and fewer negative effects of body image on sexual enjoyment and sexual acceptability than women, but did not differ in reported sex appeal. Poorer sexuality-related body image was reported by people with higher BMIs, not in relationships, who had sex less frequently, among White compared to Black women and men, and among gay compared to heterosexual men. Data also revealed a subgroup of respondents who reported that their body image had a positive impact on their sex lives. The findings highlight a need for interventions addressing sexuality-related body image.

Translation, Cross-Cultural Adaptation, and Psychometric Properties of the Perceptions of Dating Infidelity Scale in Brazilian Portuguese

The Perceptions of Dating Infidelity Scale (PDIS) assesses how people perceive infidelity through specific behaviors. Originally developed by Wilson et al. (2011), it contains 12 items distributed into three factors: (1) ambiguous, (2) deceptive, and (3) explicit behaviors. In the present research, translation, cross-cultural adaptation, and validation of the PDIS in Brazilian Portuguese were performed. First, qualitative analyses took place: translation, translation synthesis, content validation, pre-test, and reverse translation. Then, quantitative analyses were conducted: psychometric parameter tests with confirmatory factor analysis and reliability. A total of 252 participants were recruited, 160 of whom were female (63.5%). The results indicated consistent PDIS adequacy (conceptual and idiomatic equivalences); satisfactory content validity coefficients regarding language clarity, practical pertinence, and theoretical relevance; and an almost perfect level of consensus regarding the theoretical dimension. The application of the pre-test was proven to be a good parameter for estimating the comprehension of the instrument in the culture for which it was intended. Confirmatory factor analysis showed good indices of adjustment quality of the tested trifactorial model (three factors being identified with ambiguous, deceptive, and explicit behaviors). Therefore, the structure indicated in the original version was corroborated and the instrument's reliability confirmed. The Brazilian Portuguese PDIS is a useful tool for evaluating infidelity perceptions in the Brazilian culture.

Debunking Lesbian Bed Death: Using Coarsened Exact Matching to Compare Sexual Practices and Satisfaction of Lesbian and Heterosexual Women

The current study examined the prevalence and correlates of over 50 sexual practices in a national survey of heterosexual and lesbian women in relationships. Coarsened exact matching was used to create comparable samples of heterosexual (n = 2510) and lesbian (n = 283) women on six demographic factors, including relationship length. Heterosexual and lesbian women were equally likely to be sexually satisfied (66% heterosexual women vs. 68% lesbian women). Compared to heterosexuals, lesbians were more likely to report having sex 0-1 times per month (11% vs. 23%) and were less likely to report having sex greater than once per month (89% vs. 77%). Among women who had been in relationships for longer than 5 years, heterosexual women were less likely than lesbian women to report having sex 0-1 times per month (15%; 42%). This steeper drop in sexual frequency among lesbian women than heterosexual women has pejoratively been labeled lesbian bed death. Rather than accept the label "lesbian bed death" as characterizing these sexual relationships, we turn our attention to what we call lesbian bed intimacies: the myriad ways that lesbian women incorporate behaviors promoting emotional connection, romance, and mood setting, as well as relying on a wide variety of specific sexual acts (e.g., use of sex toys) and sexual communication. Compared to heterosexual women, lesbian women were more likely to usually to always receive oral sex during sex in the past month (28%; 47%) and to use sex toys in the past year (40%; 62%). In their last sexual encounter, lesbian women were more likely to say "I love you" (67%; 80%), have sex longer than 30 min (48%; 72%), and engage in gentle kissing (80%; 92%). These intimacies likely help explain why sexual satisfaction was similar in these groups despite notable differences in sexual frequency.

Women's Reaction to Opposite- and Same-Sex Infidelity in Three Cultures : Data from Canada, Samoa, and the Istmo Zapotec

Previous research indicates that Euro-American women are more upset by imagining their male partners committing homosexual infidelities than heterosexual ones. The present studies sought to replicate these findings and extend them to two non-Western cultures wherein masculine men frequently engage in sexual interactions with feminine third-gender males. Across six studies in three cultural locales (Canada, Samoa, and the Istmo Zapotec), women were asked to rate their degree of upset when imagining that their partner committed infidelity that was heterosexual in nature, as well as infidelity that was homosexual. In two Canadian undergraduate samples, women reported greater upset at imagining partner infidelity with a female, whereas a community sample of middle-aged women reported equal upset across infidelity types. Samoan women reported substantially less upset at the thought of partner infidelity with a third-gender male (fa'afafine) than with a female. Istmo Zapotec women reported equal upset toward infidelity with a female or a third-gender male (muxe), whereas a second Zapotec sample reported slightly greater upset at the thought of infidelity with a muxe. Results illustrate how cultural contexts moderate the degree to which same-sex infidelity scenarios are upsetting to women.

Sexual Practices and Satisfaction among Gay and Heterosexual Men in Romantic Relationships: A Comparison Using Coarsened Exact Matching in a U.S. National Sample

Gay men are underrepresented in research on sexual satisfaction. We examined sexual satisfaction and over 50 sexual practices in an online U.S. national survey of men in relationships. Coarsened exact matching created comparable samples of heterosexual (n = 3527) and gay (n = 452) men on six demographic factors, including relationship length. Results identified many similarities between the groups, including sexual frequency, orgasm frequency, duration of sex, and sexual satisfaction. The majority of heterosexual and gay men expressed physical or emotional affection during their last sexual encounter, reporting that they or their partner said "I love you" (66%; 57%) and engaged in deep kissing (69%; 75%) or gentle kissing (82%; 72%). Heterosexual men were less likely than gay men to usually-always receive (27%; 61%) or give (37%; 68%) oral sex when intimate in the past month; were less likely to view pornography with their partner (35%; 61%); but were more likely to give their partner massages in the past year to improve their sex lives (71%; 58%). Number of sexual communication behaviors was a strong predictor of sexual satisfaction, particularly for gay men (β =.36). These findings enhance our understanding of heterosexual and gay men's sexual lives.

Investigating the emergence of sex differences in jealousy responses in a large community sample from an evolutionary perspective

Sex differences in jealousy responses to sexual and emotional infidelity are robust in samples of heterosexual adults, especially in more gender egalitarian nations. However, investigations of when and how these differences develop have been scant. We applied two forced choice infidelity scenarios in a large community sample of high school students (age 16–19, N = 1266). In line with previous findings on adults using the forced choice paradigm, adolescent males found the sexual aspect of imagined infidelity more distressing than adolescent females did. Nevertheless, there was no effect of age on the jealousy responses, and age did not moderate the sex difference. There were neither any effects of three covariates (having had first sexual intercourse, being in a committed romantic relationship, and sociosexuality), neither as markers of pubertal maturation nor as psychosocial environmental stimuli. Future research needs to investigate even younger samples in order to specify at what age the sex difference in jealousy responses emerges.

Assumption of the Myths of Romantic Love: Its Relationship With Sex, Type of Sex-Affective Relationship, and Sexual Orientation

Romantic love promotes and lays the foundation for the development of hegemonic affective sex relationships, guiding the normative ways of feeling and experiencing love. This way of conceiving love is an intrinsic part of women's subordination, and it entails a greater tolerance for situations of violence in sex-affective relationships in which the exercise of asymmetric power relations between men and women is legitimized. With the current advent of the postmodern stage, a wide variety of dissident (non-heterosexual) sexual orientations with heterosexual hegemony have been given greater visibility and legitimacy, and new ways of relating to sex affectively have emerged initially opposed to traditional romantic discourse, the fundamental pillar of monogamy. The aim of the present work was to study whether these different ways of linking us and understanding affective sex relations marked a significant difference with respect to the heterosexual monogamous hegemonic model in the assumption of the mythified ideas of romantic love. Therefore, we studied the relationship between sex, sexual orientation, and the type of sex-affective relationship (monogamous or non-monogamous by consensus) in the assumption of the myths of romantic love. For this purpose, an instrument that showed appropriate psychometric properties was created, and a cross-sectional study was carried out with a sample of 1,235 people who completed a self-administered online questionnaire. The results indicated that there were no significant differences according to sex, but there were differences in sexual orientation and type of relationship. It may be concluded that a person, regardless of sex, heterosexual or homosexual, monogamous or who has never had affective sex relations, will have a significantly greater probability of assuming the myths of romantic love than a person with a sexual orientation other than heterosexual or homosexual and who is in a non-monogamous consensual relationship.

Assessing Implicit Associations with Consensual Non-monogamy Among U.S. Early Emerging Adults: An Application of the Single-Target Implicit Association Test

Research has demonstrated that implicit and explicit attitudes toward consensual nonmonogamy (CNM; sexually and/or emotionally nonexclusive romantic relationships) are less favorable than those toward monogamy. Although this general pattern of results is often reported, it is not clear to what extent this implicit difference reflects negative associations with CNM. To investigate this issue, the current study assessed 355 U.S. early emerging adults' (89 men, 265 women, one gender nonconforming) implicit associations with CNM and monogamy using the Single-Target Implicit Association Test (ST-IAT). In addition, the convergent (using explicit measures), postdictive, and concurrent validity of the CNM ST-IAT was also investigated. The results revealed that although early emerging adults demonstrated a positive implicit association with monogamy (mean D score = 0.38), a neutral implicit association emerged for CNM (mean D score = 0.00). Additionally, young women and those without previous CNM experience demonstrated more negative implicit associations with CNM as compared to men and those with previous CNM experience. Finally, implicit associations with CNM predicted willingness to allow one's partner to participate in CNM, but not one's own interest in CNM. These results support previous research suggesting that a disparity in attitudes toward CNM and monogamy exists and provides further clarification reflecting positive implicit associations with monogamy and neutral associations with CNM. These results also confirm that monogamous relationships continue to be upheld as the ideal relationship structure in the U.S. and that educators/practitioners should work to reduce negative implicit bias toward CNM in an attempt to promote relationship equity.

Perceptions of monogamy, nonconsensual nonmonogamy and consensual nonmonogamy at the intersections of race and gender

Given the historical entrenchment of racialised stereotypes of Black women and Black men as sexually promiscuous, we wondered whether consensual nonmonogamy (CNM) among Black partners would be seen as favourably as among white partners. We also wondered if Black participants would perceive different relationship types differently from white participants. We pursued these questions in a vignette study featuring heterosexual couples coded as Black or as white and engaged in three different relationship types: monogamy, nonconsensual nonmonogamy (NCNM) and CNM. To facilitate comparisons across race*gender intersections, we used a sample comprising equivalent numbers of Black women, white women, Black men and white men aged 18-40. Contrary to expectations, analyses did not offer evidence of a racialised sexual double standard insofar as participant perceptions of relationship quality did not differ when considering a Black couple or a white couple. Indicating the persistence of mononormativity, participants across race*gender subsamples perceived monogamous relationships to be of higher quality, regardless of the vignette couple's race. We also found Black women, Black men and white women perceived CNM more favourably than NCNM, while there was no differentiation between CNM and NCNM among white men.

Are Playboy (and girl) Norms Behind the Relationship Problems Associated with Pornography Viewing in Men and Women?

Research has indicated that pornography viewing is related to romantic relationship problems. However, the correlations across past studies have been small. We tested a model in which playboy norm conformity (i.e. desires to have frequent sex with multiple partners) functions as a confound between pornography viewing constructs on three romantic relationship wellbeing indicators: Relationship satisfaction, relationship commitment, and infidelity proclivity. Results from men (n = 286) and women (n = 717) indicated that the significant inverse correlations between relationship satisfaction and relationship commitment with pornography viewing constructs becomes non-significant when playboy norm conformity is accounted. Further, the positive relationship between pornography viewing and infidelity proclivity also becomes non-significant in women (no initial connection between pornography viewing and infidelity proclivity was found in men). Though conformity to playboy norms was more strongly related to all romantic relationship wellbeing indicators across genders, pornography viewing frequency was still significantly inversely correlated with relationship satisfaction for women; though the effect size was small. Moderation analyses suggested that pornography viewing frequency was more strongly inversely correlated with relationship satisfaction for women than men. Cumulatively, our results suggest conformity to playboy norms is a significant confounding variable between pornography viewing and romantic relationship wellbeing.

Extradyadic Behaviors and Gender: How Do They Relate With Sexual Desire, Relationship Quality, and Attractiveness

Recent years have seen an increasing number of studies on relationship extradyadic behaviors (Pinto and Arantes, 2016; Pazhoohi et al., 2017; Silva et al., 2017; Fisher, 2018). However, much is still to learn about the impact of these extradyadic behaviors on subsequent relationships that an individual may have. Our main goal was to study the association between past extradyadic behaviors – inflicted and suffered – and current relationship quality, sexual desire and attractiveness. Specifically, we aimed to: (i) Understand if past extradyadic behaviors are related to current relationship quality, sexual desire, and self-perceived and partner’s attractiveness; (ii) Identify possible gender differences in these variables. For that, 364 participants (251 females and 113 males) were recruited through personal and institutional e-mails, online social networks (e.g., Facebook), and the website of the Evolutionary Psychology Group from the University of Minho. All participants completed a demographic and relationship questionnaire, followed by questions related to extradyadic behaviors and self-perceived attractiveness, the Perceived Relationship Quality Components (PRQC) Inventory, the Sex Drive Scale (SDQ), and the Importance of Partner’s Physical Attractiveness Scale (IPPAS). For those currently involved in a relationship, results suggested that extradyadic behaviors (both suffered or inflicted) are linked with current low relationship quality and high sexual desire in the present. In addition, individuals who perceived themselves as being more attractive tended to have a higher sexual desire and higher relationship quality. Overall, men reported higher levels of extradyadic behaviors and sexual desire, gave more importance to physical attractiveness, and perceived their current relationship as having less quality than women. These results add to the literature by focusing on different variables that play an important role in romantic relationships, and have important implications.

Celos, desesperanza e ideación suicida en población con orientación sexual diversa

Los celos, la desesperanza y la ideación suicida son emociones que disminuyen la calidad de vida de quienes los padecen y a quienes afectan. En el imaginario social, prevalece la idea de que tales problemas se exacerban en las parejas constituidas por personas con orientación sexual diversa, razón por la cual se analizó la relación entre estas variables, en un grupo constituido por heterosexuales (79 %) y no heterosexuales (21 %). La muestra fue intencional, los participantes fueron 288 colombianos, mayores de 18 años. La estrategia metodológica utilizada fue predictiva transversal. Los instrumentos empleados fueron el CECLA que evalúa clases de celos en población colombiana y el Inventario de Desesperanza e Ideación Suicida (IDIS). Respecto a la relación entre la orientación sexual y la ideación suicida, los resultados mostraron diferencias entre los heterosexuales y los otros dos grupos (homosexuales y bisexuales) F = 10.49, p < 0.05.  La prueba post hoc indicó que las diferencias se presentaron entre heterosexuales y homosexuales p < 0.05 y entre heterosexuales y bisexuales p < 0. No se encontraron diferencias estadísticamente significativas entre la orientación sexual y las variables celos y desesperanza. Pero independientemente de la orientación sexual, se halló relación entre la triada celos-desesperanza-ideación suicida, la cual se presenta en un modelo de ecuaciones estructurales.

Jealousy, Consent, and Compersion Within Monogamous and Consensually Non-Monogamous Romantic Relationships

Evolutionary psychological research has studied romantic jealousy extensively within monogamous relationships, but has largely ignored jealousy among partners who mutually consent to forming extra-pair relationships (i.e., consensual non-monogamy; CNM). We examined monogamous (n = 529) and CNM (n = 159) individuals' reactions to imagining their romantic partner(s)'s extra-pair involvement. For each romantic partner, men and women completed measures of relationship jealousy and reacted to scenarios of their partner's extra-pair emotional and sexual involvement. Scenarios prompted participants to indicate which type of involvement would be more distressing and more enjoyable. They also described whether or not participants had consented to their partner's extradyadic relationship. Monogamous men were more distressed by a partner's extradyadic sexual versus emotional involvement (and a partner's emotional involvement was more enjoyable) whether the scenario was consensual or not. Monogamous women were more distressed by a partner's emotional versus sexual involvement (and a partner's sexual involvement was more enjoyable) for consensual, but not non-consensual, scenarios. There were no gender differences among CNM participants. Monogamous individuals reported greater emotional distress toward a partner's imagined extradyadic involvement, whereas CNM individuals reported thinking about their partner's extra-pair relationships more frequently. Monogamous (vs. CNM) individuals reported greater confidence that their partner would never cheat on them (i.e., enter another relationship without their consent), and CNM participants were more confident that their primary versus secondary partner would never cheat, although this effect was stronger among CNM women. Moreover, CNM participants rated that it was more important that their primary versus secondary partner did not cheat, and reported greater distress imagining that their primary versus secondary partner had cheated. Women in CNM relationships rated it more important that their partner did not cheat sexually than emotionally. Finally, we replicated previous research showing that monogamous individuals mate guard more than CNM individuals, who mate guard their primary versus secondary partner more frequently. Future directions for developing evolutionary and romantic relationship research on CNM are discussed.

Patterns of paternal investment predict cross-cultural variation in jealous response

Long-lasting, romantic partnerships are a universal feature of human societies, but almost as ubiquitous is the risk of instability when one partner strays. Jealous response to the threat of infidelity is well studied, but most empirical work on the topic has focused on a proposed sex difference in the type of jealousy (sexual or emotional) that men and women find most upsetting, rather than on how jealous response varies^1,2. This stems in part from the predominance of studies using student samples from industrialized populations, which represent a relatively homogenous group in terms of age, life history stage and social norms^3,4. To better understand variation in jealous response, we conducted a 2-part study in 11 populations (1,048 individuals). In line with previous work, we find a robust sex difference in the classic forced-choice jealousy task. However, we also show substantial variation in jealous response across populations. Using parental investment theory, we derived several predictions about what might trigger such variation. We find that greater paternal investment and lower frequency of extramarital sex are associated with more severe jealous response. Thus, partner jealousy appears to be a facultative response, reflective of the variable risks and costs of men's investment across societies.

Sex Differences in Responses to Emotional and Sexual Infidelity in Dating Relationships

Abstract. This study examined the influence of the type of partner infidelity (sexual vs. emotional) and sex of participant on actual mate abandonment and mate retention behaviors. It was predicted that men would engage in significantly more mate abandonment behaviors after experiencing a physical infidelity and that women would engage in significantly more mate abandonment behaviors after experiencing an emotional infidelity. To test this hypothesis, men and women who had either experienced a sexual or emotional infidelity were recruited and were asked to complete several measures designed to indicate their behavioral responses to the infidelity. The men and women in the study showed the predicted asymmetrical pattern of behavioral choices in response to sexual and emotional infidelity.

Gendered perceptions of fairness in housework and shared expenses: Implications for relationship satisfaction and sex frequency

There is a demonstrated relationship between couples’ division of household chores—and, to a lesser extent, the division of shared expenses—and their relationship quality. Less is known, however, about whether and how individuals’ perceived fairness of these arrangements is associated with couples’ relationships in different ways. Using a gendered equity framework, and drawing on 10,236 responses collected via an online national news website, this study examines how equity evaluations of housework and shared expenses are related to relationship satisfaction and sex frequency among different-gender household partners. Consistent with previous findings, the results indicate that evaluations of unfairness to oneself are a stronger predictor of relationship quality than perceived unfairness to one’s partner. Additionally, fairness evaluations over shared expenses are a stronger predictor of relationship quality than perceived equity in housework. Incorporating notions about traditional gender norms and expectations into the justice framework, the results point to some variation in relationship outcomes based on men’s and women’s differential equity evaluations.

Human Mating Theory, Migration, and Marital Dissolution

Marriage dissolution has been extensively analyzed in the last few decades, looking for the determinants of this well-known phenomenon, but so far the relationship between female migration and marriage dissolution does not seem to have been thoroughly investigated. This work aimed to analyze the correlation between marriage dissolution and migration, which might bias the sex ratio within a given society, introducing new social and cultural values. Considering the Regions of Italy between 2002 and 2007 (i.e., 120 observations), several multiple regression models (OLS) were presented to test the proposed hypothesis, applying the robust option. The dependent variable of our empirical investigation was a marriage dissolution index, while the key explanatory variables were a sex ratio and several female rates. Based on the results, the hypothesis of a statistically significant positive relation between the influx of female immigrants and household dissolution could be supported (i.e., p < .01). However, not all migrating women are the same and a different impact is foreseeable according to the nature of this influx. Indeed, given a 1% influx of unmarried foreign females, increasing the sex ratio within society, marital dissolutions grow by 5381 for every 100,000 marriages. In the case of a 1% influx of Italian unmarried females, marital dissolutions grew by 3173 for every 100,000 marriages. Therefore, females could have specific sexual, social and cultural characteristics, which might be able to increase (or decrease) the probability of men being driven to sexual infidelity, thus leading to a higher frequency of marriage dissolutions.

Differences in Orgasm Frequency Among Gay, Lesbian, Bisexual, and Heterosexual Men and Women in a U.S. National Sample

There is a notable gap between heterosexual men and women in frequency of orgasm during sex. Little is known, however, about sexual orientation differences in orgasm frequency. We examined how over 30 different traits or behaviors were associated with frequency of orgasm when sexually intimate during the past month. We analyzed a large US sample of adults (N = 52,588) who identified as heterosexual men (n = 26,032), gay men (n = 452), bisexual men (n = 550), lesbian women (n = 340), bisexual women (n = 1112), and heterosexual women (n = 24,102). Heterosexual men were most likely to say they usually-always orgasmed when sexually intimate (95%), followed by gay men (89%), bisexual men (88%), lesbian women (86%), bisexual women (66%), and heterosexual women (65%). Compared to women who orgasmed less frequently, women who orgasmed more frequently were more likely to: receive more oral sex, have longer duration of last sex, be more satisfied with their relationship, ask for what they want in bed, praise their partner for something they did in bed, call/email to tease about doing something sexual, wear sexy lingerie, try new sexual positions, anal stimulation, act out fantasies, incorporate sexy talk, and express love during sex. Women were more likely to orgasm if their last sexual encounter included deep kissing, manual genital stimulation, and/or oral sex in addition to vaginal intercourse. We consider sociocultural and evolutionary explanations for these orgasm gaps. The results suggest a variety of behaviors couples can try to increase orgasm frequency.

Once a Cheater, Always a Cheater? Serial Infidelity Across Subsequent Relationships

Although there is a large body of research addressing predictors of relationship infidelity, no study to our knowledge has specifically addressed infidelity in a previous relationship as a risk factor for infidelity in a subsequent relationship. The current study addressed risk for serial infidelity by following adult participants (N = 484) longitudinally through two mixed-gender romantic relationships. Participants reported their own extra-dyadic sexual involvement (ESI) (i.e., having sexual relations with someone other than their partner) as well as both known and suspected ESI on the part of their partners in each romantic relationship. Findings from logistic regressions showed that those who reported engaging in ESI in the first relationship were three times more likely to report engaging in ESI in their next relationship compared to those who did not report engaging in ESI in the first relationship. Similarly, compared to those who reported that their first-relationship partners did not engage in ESI, those who knew that their partners in the first relationships had engaged in ESI were twice as likely to report the same behavior from their next relationship partners. Those who suspected their first-relationship partners of ESI were four times more likely to report suspicion of partner ESI again in their next relationships. These findings controlled for demographic risk factors for infidelity and held regardless of respondent gender or marital status. Thus, prior infidelity emerged as an important risk factor for infidelity in next relationships. Implications for novel intervention targets for prevention of serial relationship infidelity are discussed.

Sexual Behavior, Definitions of Sex, and the Role of Self-Partner Context Among Lesbian, Gay, and Bisexual Adults

Prior research has examined how heterosexual individuals define sex; however, these studies have rarely focused on sexual minority individuals or included a full range of applicable sexual behaviors. Participants were recruited from a local Pride Festival across two years. Study 1 (N = 329) was primarily descriptive and examined which physically intimate behaviors lesbian, gay, and bisexual (LGB) participants included in their definitions of sex and the behaviors in which they had previously engaged. Study 2 (N = 393) utilized a between-subjects design to assess differences in definitions of sex when judging one's own behavior compared with that of a partner outside of the relationship. The behaviors in which participants were most likely to have engaged were manual-genital (82%) and oral-genital stimulation (79%). Regarding definitions of sex, a clear "gold standard" emerged for men, with 90% endorsing penile-anal intercourse as sex. No equally clear standard existed for women. Participants who were asked to consider their partner's behavior outside of their relationship were more likely to endorse the behavior as "having sex" than participants asked to consider their own behavior. This study addressed a major limitation of prior research by investigating definitions of sex among a community sample of LGB adults, with implications for provision of health care and sexual agreements between same-sex couples.

Correlates of Sex Frequency and Sexual Satisfaction Among Partnered Older Adults

This study examines behaviors associated with sex frequency and sexual satisfaction in a national sample of partnered older adults, age 50 to 85 (N = 9,164), together for over one year. The results indicate that older adults with active and satisfying sex lives engage more frequently in open sexual communication and setting the mood for sexual activity. Additionally, synchronicity in sexual desire and activities is related to a high-frequency and highly satisfying sex life in older adulthood. An expansive sexual repertoire, as measured by the number of sexual activities used during the last sexual encounter and the incorporation of sexual variety, is also associated with greater sex frequency and sexual satisfaction.

What Keeps Passion Alive? Sexual Satisfaction Is Associated With Sexual Communication, Mood Setting, Sexual Variety, Oral Sex, Orgasm, and Sex Frequency in a National U.S. Study

Passion and sexual satisfaction typically diminish in longer-term relationships, but this decline is not inevitable. We identified the attitudes and behaviors that most strongly differentiated sexually satisfied from dissatisfied men and women who had been together for at least three years (N = 38,747). Data were collected in 2006 from cohabiting and married men (M) and women (W) via an online survey on a major national U.S. news Web site. The vast majority of these participants reported being satisfied with their sex lives during their first six months together (83% W; 83% M). Satisfaction with their current sex lives was more variable, with approximately half of participants reporting overall satisfaction (55% W; 43% M) and the rest feeling neutral (18% W; 16% M) or dissatisfied (27% W; 41% M). More than one in three respondents (38% W; 32% M) claimed their sex lives were as passionate now as in the beginning. Sexual satisfaction and maintenance of passion were higher among people who had sex most frequently, received more oral sex, had more consistent orgasms, and incorporated more variety of sexual acts, mood setting, and sexual communication. We discuss implications of these findings for research and for helping people revitalize their sex lives.

Correlates of appearance and weight satisfaction in a U.S. National Sample: Personality, attachment style, television viewing, self-esteem, and life satisfaction

We examined the prevalence and correlates of satisfaction with appearance and weight. Participants (N=12,176) completed an online survey posted on the NBCNews.com and Today.com websites. Few men and women were very to extremely dissatisfied with their physical appearances (6%; 9%), but feeling very to extremely dissatisfied with weight was more common (15%; 20%). Only about one-fourth of men and women felt very to extremely satisfied with their appearances (28%; 26%) and weights (24%; 20%). Men and women with higher body masses reported higher appearance and weight dissatisfaction. Dissatisfied people had higher Neuroticism, more preoccupied and fearful attachment styles, and spent more hours watching television. In contrast, satisfied people had higher Openness, Conscientious, and Extraversion, were more secure in attachment style, and had higher self-esteem and life satisfaction. These findings highlight the high prevalence of body dissatisfaction and the factors linked to dissatisfaction among U.S. adults.