Lesbians orgasm during sex 75% of the time they sleep with a familiar — a far higher rate than straight women, who only climax during two out of three sexual encounters. Bisexual women have the worst luck in the department, orgasming just 58% of the time. Unsurprisingly to almost anyone, men (gay or straight) reached climax at a far higher rate of 85%. Bisexual men, on the other hand, orgasmed a bit less at 78%.