] %u201CWe think of it as genes for %u2018male
] homosexuality%u2019, but it might really be genes for
] sexual attraction to men. These could predispose men
] towards homosexuality and women towards
] %u2018hyper-heterosexuality%u2019, causing women to have
] more sex with men and thus have more offspring.%u201D

Article: Survival of genetic homosexual traits explained�| New Scientist