So long as we're doing studies, here's more evidence that being gay is something you are, not something you become. It's long been known that your likelihood of homosexuality raises with each older brother -- often called the fraternal order birth effect. What wasn't known was whether that was a nature or a nurture effect. Well, problem solved. A new study looked at children raised outside their biological home, either in adopted, step, or otherwise altered environments. The effect, even separated from the presence of older brothers, remains. More evidence that anti-gay bigotry is punishment and hatred for an intrinsic characteristic, no different than sexism or racism in nature.