GAYS DEFEND MARRIAGE

Time Magazine weighs in on the biological aspects of the Phantom Gay Past:

Which raises the evolutionary question of why men and women who are exclusive gay and lesbian exist. One answer is that exclusive gays and lesbians are a relatively new creation: the concept of exclusive homosexuality barely existed before modernity; even a century ago, most same-sex-attracted men and women got married and had kids.(Read “Do Monkeys Pay for Sex?”)

As Bailey, Zuk and many others have pointed out, no one has offered an adequate evolutionary explanation for the relatively recent development of exclusive homosexuality among humans. In January, the journal Evolution and Human Behavior published a paper exploring the idea that certain alleles increase the likelihood of homosexuality by blocking the effect of androgens during fetal development. Having all those alleles hampers the masculinization of some parts of the brain that affect personality, making you gay, the theory goes. Brothers of gay men who have only some of the alleles would turn out straight but less aggressive than typical guys. And because those brothers exhibit less psychopathology, they would attract more women and therefore have more kids. It was a provocative theory, but it turned out not to be proved: gay men’s brothers don’t actually have more kids than straight men’s brothers do.