[T]he more older brothers a man has, the more likely he is to be gay. But it has not been clear if this is a prenatal effect or a psychosocial effect, related to growing up with older male siblings.The reason for this, theoretically, is that the more male offspring a woman produces, over time, she'll develop (don't even laugh) antibodies that will try to protect her body against this "foreign" object. So:
"If this immune theory were correct, then the link between the mother's immune reaction and the child's future sexual orientation would probably be some effect of maternal anti-male antibodies on the sexual differentiation of the brain," [Dr. Anthony F. Bogaert] suggests.Interesting theory, but then, does the same thing happen with women? And is bisexuality a different chemical reaction? Is heterosexuality?
While I do support the idea that people are born with their sexual orientation, I don't know if I'm ready to accept Dr. Bogaert's claim. I mean, I'm an only child, and I'm straight - so does this mean that only children are more likely to be heterosexual? Were the circumstances surrounding my conception "just right" in creating a non-gay daughter? And just how many sons do you have to pop out before you start producing the "anti-boy" antibodies?
Anyway. The whole "a-mother-will-start-to-create-"anti-boy"-antibodies-if-she-bears-enough-sons" idea cracks me up.