I read about a study that said hormones produced during pregnancy could cause homosexuality if there is too much or too little. the study was on humans but the experimenting was on rats. The pregnant rats were put in bad conditions to depress them, thus altering the hormoan production. The babies that were born came in 3 sexual orientations- 1- Straight 2- Bisexual (males were tops or studs with females but bottoms or duds with other males) 3- Asexual (no attraction to either gender period) the study also concluded that more gay people are born after war time ( which is the happiest time in the world,ain’t it?). This supposts that the stress on the mother, which does effect production and function of the body and its parts (including hormones), could also effect the hormones the fetus has thus determining sexual orientation. this is still just an unproven study.