Scientists may have discovered an evolutionary basis for (male) homosexuality, previously considered a paradox of evolutionary biology. It appears that the same genetic factors that are responsible for homosexuality in men cause
higher fecundity in women; i.e., whilst (most) gay men don't have children, their female relatives (who share the genetic factors) make up for this. (via FmH)
"This is a novel finding," says Simon LeVay, a neuroscientist and commentator on sexuality at Stanford University in California. "We think of it as genes for 'male homosexuality', but it might really be genes for sexual attraction to men. These could predispose men towards homosexuality and women towards 'hyper-heterosexuality', causing women to have more sex with men and thus have more offspring."