Why the Sexual Tipping Point ® Is a “Variable Switch Model”

"Not Now, I Am Too Stressed": Stress and Physical Intimacy in Early Marriage

Stressful events can disrupt couples' emotional connection, yet prior research is mixed regarding whether stress also disrupts couples' physical intimacy. This study considered whether stress must reach a critical threshold before hindering couples' sexual activity and physical affection (i.e., a curvilinear association). Couples (N = 144 couples plus four additional wives) completed two 14-day daily diary tasks during the early years of marriage. Multilevel modeling revealed a within-person curvilinear association between daily stress and sexual activity. Contrary to expectations, the likelihood of sexual activity declined as stress increased from low to moderate, then leveled off as stress continued to increase. For physical affection, a linear effect emerged. On days of greater stress, women, but not men, reported less affection. Further analyses suggested that women's stress is more influential than men's stress for couple's physical intimacy. Findings highlight the nuanced ways in which stress is linked to a vital component of satisfying relationships.

Orgasm and Related Disorders Depend on Neural Inhibition Combined With Neural Excitation

INTRODUCTION

Prevalent models of sexual desire, arousal and orgasm postulate that they result from an excitatory process, whereas disorders of sexual desire, arousal and orgasm result from an inhibitory process based on psychosocial, pharmacological, medical, and other factors. But neuronal excitation and active neuronal inhibition normally interact at variable intensities, concurrently and continuously. We propose herein that in conjunction with neuronal excitation, neuronal inhibition enables the generation of the intense, non-aversive pleasure of orgasm. When this interaction breaks down, pathology can result, as in disorders of sexual desire, arousal, and orgasm, and in anhedonia and pain. For perspective, we review some fundamental behavioral and (neuro-) physiological functions of neuronal excitation and inhibition in normal and pathological processes.

OBJECTIVES

To review evidence that the variable balance between neuronal excitation and active neuronal inhibition at different intensities can account for orgasm and its disorders.

METHODS

We selected studies from searches on PubMed, Google Scholar, Dialnet, and SciELO for terms including orgasm, neuronal development, Wallerian degeneration, prenatal stress, parental behavior, sensorimotor, neuronal excitation, neuronal inhibition, sensory deprivation, anhedonia, orgasmic disorder, hypoactive sexual desire disorder, persistent genital arousal disorder, sexual pain.

RESULTS

We provide evidence that the intensity of neuronal inhibition dynamically covaries concurrently with the intensity of neuronal excitation. Differences in these relative intensities can facilitate the understanding of orgasm and disorders of orgasm.

CONCLUSION

Neuronal excitation and neuronal inhibition are normal, continuously active processes of the nervous system that are necessary for survival of neurons and the organism. The ability of genital sensory stimulation to induce concurrent neuronal inhibition enables the stimulation to attain the pleasurable, non-aversive, high intensity of excitation characteristic of orgasm. Excessive or deficient levels of neuronal inhibition relative to neuronal excitation may account for disorders of sexual desire, arousal and orgasm.

The Evolution of the Female Sexual Disorder/Dysfunction Definitions, Nomenclature, and Classifications: A Review of DSM, ICSM, ISSWSH, and ICD

INTRODUCTION

The 2 most well-known classification systems that include sexual medicine diagnoses are the International Classification of Diseases and Statistics (ICD) and the Diagnostic and Statistical Manual of Mental Disorders (DSM). Sexual medicine experts from international societies representing an array of disciplines have revised and redefined female sexual dysfunctions (FSDs) to reflect current scientific evidence and the state of the art.

AIM

To summarize the evidence and interactive and chronological process by which sexual medicine societies' consensus groups developed the current nomenclature, classifications, and definitions for FSDs.

METHODS

We review the contributions and collaborations of the Fourth International Consultation in Sexual Medicine (ICSM), the International Society for the Study of Women's Sexual Health (ISSWSH), and the World Association of Sexual Health in conjunction with the World Health Organization.

MAIN OUTCOME MEASURES

The ICSM and ISSWSH diagnostic systems are contrasted with the DSM classification. We discuss innovations and strengths; relevant evidence regarding epidemiology, etiology, and risk factors; and key differences. We describe how sexual medicine expertise informed FSD codes in the ICD-11 classification.

RESULTS

ICSM and ISSWSH published evidence-based guidelines on the definitions, nomenclature, and diagnostic criteria for FSD that diverge from the DSM psychiatric compendia. These definitions and nomenclature recommend the separation of female sexual desire and arousal disorders, elaborate on subtypes of arousal problems, broaden the scope of sexual pain definitions, and provide a greater understanding of etiologies and risk factors for FSDs.

CONCLUSIONS

These collaborations among sexual medicine experts and their role in the ICD-11 development process provide confidence that the ICD-11 Sexual Dysfunction codes are based on current scientific evidence for diagnosing and coding FSDs in clinical settings worldwide, can serve as endpoints in clinical trials, and will provide specificity for treatment outcomes for FSD therapies. Parish SJ, Cottler-Casanova S, Clayton AH, et al. The Evolution of the Female Sexual Disorder/Dysfunction Definitions, Nomenclature, and Classifications: A Review of DSM, ICSM, ISSWSH, and ICD. Sex Med 2021;9:36-56.