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Sexual behavior is one of the reported similarities between Pan paniscus and Homo sapiens that has stimulated recent interest in the phylogeny of the Pan and the Australopithecus/Homo genera. Similarities do exist, but an understanding of the forms and functions of Van paniscus sexual behavior is best achieved through a comparison to Pan troglodytes. Pan paniscus shows increased female receptivity, variability in copulatory position, male or female initiation of sexual behavior, differential male and female preferences for copulatory position, and association of food sharing and sexual behavior. Their sexual behavior appears to function in proximate terms as a tension‐reduction mechanism. Lowered tension, in turn, facilitates multi‐male, multi‐female social groups. Lowered levels of aggression and increased sexual activity appear to be associated with paedomorphism, and the behavioral and anatomical/physiological characteristics of the species appear to be a consequence of a feeding ecology that promotes large groupings of the animals at preferential and comparatively rich feeding sites.

AbstractHumans, and other mammals, require specific interactions between two adults in order to procreate. The importance of these encounters for the genes has turned sex into an exceedingly varied and complicated form of behavior. Human sexual behavior is largely guided and motivated by feelings, and has a considerable impact on both individual well-being and the fabric of society. It is therefore important to assess how this aspect of life functions in industrialized societies. The present analysis uses the perspective of evolutionary biology but is based on research in sexuality, anthropology, animal behavior, positive psychology, and gender differences. Given that society should aim for maximizing the well-being of its members, the present situation does not appear to be optimal. The social environment of modern societies is likely to cause an increase in the prevalence of sex-related suffering and a reduction in the harvest of positive feelings. A relevant question is whether the situation regarding sex should be referred to as a 'disease of modernity.'

Dramatic political, economic, and social changes in China over the past several decades have been accompanied by much discussion in popular media and among academics of a fundamental transformation in Chinese sexual behavior. Several studies have examined current Chinese sexual behavior but have been limited to particular provinces or cities and have been based on non‐random samples. The potential threat of a generalized HIV epidemic in China highlights the dearth of population‐based information on current patterns of sexual behavior that could help design better intervention strategies and prevent misguided ones. This article uses data from the first national probability survey of adult sexual behavior in China completed during 1999–2000, along with a historical and literature review, to address three key questions: 1) Has there been a revolution in sexual behavior in China? 2) Is China unique compared to other countries in these transformations? 3) What are the implications of these findings for China's risk of a generalized HIV epidemic?

What is "normal sexual behavior" in a child?Childhood sexuality is an often neglected field in sex research. There is very little literature about what one might call "normal child sexual behavior." The existing literature on child sexuality gives the impression that the only way in which children figure in sexological research is as objects of sexual abuse. The child, as a subject learning about sexuality and capable of experiencing sexual pleasures, doesn't seem to exist in scholarly papers.Childhood Sexuality: Normal Behavior and Development does not focus on sexual abus

What is "normal sexual behavior" in a child?Childhood sexuality is an often neglected field in sex research. There is very little literature about what one might call "normal child sexual behavior." The existing literature on child sexuality gives the impression that the only way in which children figure in sexological research is as objects of sexual abuse. The child, as a subject learning about sexuality and capable of experiencing sexual pleasures, doesn't seem to exist in scholarly papers.Childhood Sexuality: Normal Behavior and Development does not focus on sexual abus

A sectarian family service agency confronts an ethical dilemma with regard to sexual behavior of clients in supervised group residences. The analysis undertaken by staff considers a wide range of values affecting this issue—the values of the client, traditional Judaism, the law, parents, community, clinical professionals, and the agency. Conflicts among these values are examined.

The research discussed here explores the sexual behavior of two hundred and twenty-eight heavy users of cocaine. Intensive, face-to-face, tape-recorded interviews with each user uncovered some interesting differences in sexuality among various user groups. Far example, male users were found to have greater levels of sexual enhancement from cocaine, than were female users. Another finding was that freebasers and snorters of the drug had similar levels of sexual impairment, while injectors experienced far worse levels of sexual dysfunction. The widespread mythology that cocaine is always a sexual aphrodisiac was certainly not confirmed by this research effort. It was found that there were a myriad of responses to the same dosage level of cocaine, depending, in part, upon the setting of the usage, as well as the background experiences of the user.