Photo: flickr/neogaboxWho has better sex: heterosexuals or homosexuals? You might have your own guesses, but these scientists surveyed over 6,000 people on the internet to generate some hard data on how often people experienced orgasm with a familiar partner. Turns out that homosexual and heterosexual men have similar orgasm frequencies (~85%), while women on average have lower (~63%) rates of orgasm. However, if you separate heterosexual and homosexual women, there's a big difference: heterosexual women reported having orgasms 61.6% of the time, while lesbians have orgasms 74.7% of the time. Interestingly, bisexual men and women both had lower orgasm frequencies compared to either their straight or gay counterparts (the authors speculate this might be due to subgroups of people with various sexual behaviors who all chose to identify as bisexual). So why do these groups differ the way they do? That remains for future studies... so we'll just leave it to your imagination for now. Variation in Orgasm Occurrence by Sexual Orientation in a Sample of U.S. Singles. "INTRODUCTION: Despite recent advances in understanding orgasm variation, little is known about ways in which sexual orientation is associated with men's and women's orgasm occurrence. AIM: To assess orgasm occurrence during sexual activity across sexual orientation categories. METHODS: Data were collected by Internet questionnaire from 6,151 men and women (ages 21-65+ years) as part of a nationally representative sample of single individuals in the United States. Analyses were restricted to a subsample of 2,850 singles (1,497 men, 1,353 women) who had experienced sexual activity in the past 12 months. MAIN OUTCOME MEASURES: Participants reported their sex/gender, self-identified sexual orientation (heterosexual, gay/lesbian, bisexual), and what percentage of the time they experience orgasm when having sex with a familiar partner. RESULTS: Mean occurrence rate for experiencing orgasm during sexual activity with a familiar partner was 62.9% among single women and 85.1% among single men, which was significantly different (F1,2848 = 370.6, P < 0.001, η2 = 0.12). For men, mean occurrence rate of orgasm did not vary by sexual orientation: heterosexual men 85.5%, gay men 84.7%, bisexual men 77.6% (F2,1494 = 2.67, P = 0.07, η2 = 0.004). For women, however, mean occurrence rate of orgasm varied significantly by sexual orientation: heterosexual women 61.6%, lesbian women 74.7%, bisexual women 58.0% (F2,1350 = 10.95, P < 0.001, η2 = 0.02). Lesbian women had a significantly higher probability of orgasm than did either heterosexual or bisexual women (P < 0.05). CONCLUSIONS: Findings from this large dataset of U.S. singles suggest that women, regardless of sexual orientation, have less predictable, more varied orgasm experiences than do men and that for women, but not men, the likelihood of orgasm varies with sexual orientation. These findings demonstrate the need for further investigations into the comparative sexual experiences and sexual health outcomes of sexual minorities." Related content: NCBI ROFL: Are there different types of female orgasm?NCBI ROFL: Friday flashback: A woman's history of vaginal orgasm is discernible from her walk.NCBI ROFL: What your lips reveal about your orgasms.