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Originally Posted by aelle  I think it's more due to culture than nature. There is a heavy stigma attached to male homosexuality, whereas lesbianism, being seen as non penetrative, is globally considered non threatening (I know that many gay men don't have penetrative sex, and that you don't have to be gay to enjoy receiving butt sex, but that's the image attached to it). So for a man to acknowledge and/or act on his homosexual tendencies creates a lot more social friction than it does for women. The few who go against the social norm are those whose tendencies are strong enough to be close to 100% gay. That's why male sexuality appears more binary and immuable than female sexuality. In a context where social judgment is truly lifted though, I'm pretty sure they'd have similar bell curves. |
Actually, there is evidence that this is not the case. It appears that one factor in the causation of male homosexuality is that the immune system of the mother sometimes attacks some specifically male proteins during the development of the male fetus. This then leads to the development of the part of the brain that does sexual attraction in more or less the same way as would be the case for female fetusses. This can only be a factor for male homosexuality, obviously.