Originally Posted by smitty2049

I remember watching a documentary years ago that said that after WW2 there were alot of gay (male) children born in London. They figured the cause was the blitz of rockets the Germans were shooting over. Everyone was stressed out. The fetus starts out female and then the mother's body produces testosterone which slowly makes the fetus male. During hightened levels of stress, the body stops producing these hormones. The assumption was the physical appearance of the fetus was now male, but internally it was still partially female, specifically in the brain.

That would be the "nature" part, but the nurture would be social aspects. I think the hormonal development would make a person attracted to the same sex, but then social roles would either help or hinder that. Hindering would just drive the person "into th closet" so to speak, probably adding alot of confusion as to why they're not attracted to the opposite sex.