The study in this week’s issue of PLOS Medicine by Jewkes and colleagues on the prevalence of consensual male-male sexual activity and non-consensual male-on-male sexual violence, and their respective associations with HIV infection in South Africa [1], makes an important contribution to the dearth of literature on population-based HIV prevalence amongst men who have sex with men (MSM) in the A...

A case is presented of a man who castrated himself and who reported he had experienced cyclic changes in sexuality for 6 years. Developmental history, including physical factors of cryptorchidism and bilateral inguinal hernias in infancy, suggests a setting in which comfortable masculine identification would have been most difficult. The feminine components of personality appear to have receive...

A deterministic compartmental sex-structured HIV/AIDS model for assessing the effects of homosexuals and bisexuals in heterosexual settings in which homosexuality and bisexuality issues have remained taboo is presented. We extend the model to focus on the effects of condom use as a single strategy approach in HIV prevention in the absence of any other intervention strategies. Initially, we mode...

The present study examined the relations of minority stressors (i.e., experiences of prejudice, expectations of stigma, internalized biphobia, outness/concealment of bisexuality) as well as posited mental health promoters (i.e., bicultural self-efficacy, cognitive flexibility) with psychological distress and well-being in a sample of 411 bisexual people. Most of the minority stress variables we...

OBJECTIVE There have been many studies investigating paraphilias and sexual compulsion, but thus far little data about prevalence of unusual sexual practices that are subthreshold for these diagnoses. The associations between unconventional sexual behavior and sociodemographic and health parameters were investigated. METHOD A cross-sectional study of 7,022 individuals (45.4% of women) was car...

In the present study, we describe and illustrate a remarkable new species of Syngonanthus from South America (Bolivia, Brazil and Peru). This new species is quickly distinguished from all species in the genus by trimerous and bisexual flowers, a unique set of characteristics in Syngonanthus. Complementary to this study, sequences of 33 species were downloaded from GenBank and four species had s...

background: despite growing interest in the public health of sexual minority, youth around the world due to the high rates of suicidal ideation and attempts in this population, few studies on the sexual orientation of korean adolescents have been conducted. therefore, this study investigated the relationship between the sexual orientation of korean adolescents and their suicide-related behavior...

INTRODUCTION Black men who have sex with men (MSM) and women but who do not identify as gay or disclose their bisexual activities to main female partners, also known as men "on the down-low," have been cited as the main reason for the increase in HIV infections in black women. METHODS Three online databases (PsychInfo, MEDLINE and AIDSLINE) were searched for scientific articles related to men...

INTRODUCTION Several retrospective and prospective studies have reported on the association between childhood gender variance and sexual orientation and gender discomfort in adulthood. In most of the retrospective studies, samples were drawn from the general population. The samples in the prospective studies consisted of clinically referred children. In understanding the extent to which the ass...

OBJECTIVES To determine the prevalence of erectile dysfunction (ED) and explore its potential sociodemographic, medical, and lifestyle correlates. METHODS While attending the "Health Awareness Fair" in nine major cities in Brazil, 1286 men completed a questionnaire regarding ED, demographic data, and medical conditions. ED was assessed by a single global self-rating question, in which subject...