Well, I'm going from the assumption, based on recent studies, that a woman's libido is pretty much equal to a man's, and that it pretty much hits fever pitch late 20's, early 30's, with another spike just post-menopause. Yet, women tend to be more inhibited due to cultural norms. So, though there are many more hetero women, many of whom may strongly desire to have sex with a man even if they must pay for it, but on the condition that it be very discreet, bonus points if he's good looking, fewer women WILL pay for heterosexual sex (as a percentage of all heterosexual women) than will gay/bi/bi-curious men (as a percentage of all gay/bi/bi-curious men). To restate, but less confusingly: there are far more heterosexual women than gay males, but of all heterosexual women, only a small percentage do I expect will pay for sex. On the other hand, though there are vastly fewer gay/bi/bi-curious men in the world than women, I expect a higher percentage of those would be willing to pay for sexual encounters. Together, the, say, 2.5 percent of heterosexual women who will pay for sex will approximate in number the 10 percent of gay/bi/bi-curious men who will. [Those numbers are made up for the purpose of demonstration and do not reflect any real estimates of behavior in these groups.] But why would I estimate the female numbers so high in comparison to your assumption? The times are a-changin' and more women (and men) are defying the societal norms. Yay!