[scripter]

A small percentage of homosexuals are biologically gay due to hormonal imbalances in the womb.

I've heard that quite a few times but have never seen any science to support it. That is, I haven't read any study that hormonal imbalances are causal to same-sex attraction.

[E. Pluribus Unum]

I've heard that quite a few times but have never seen any science to support it.

Homosexuality: A Natural Cause?

"Abstract: Male rats were exposed to prenatal (i.e. before they were born) or postnatal (after they were born) stress, or both. The prenatally stressed males showed low levels of male copulatory behavior and high rates of female lordotic responding. Postnatal stress had no effect. The modifications are attributed to stress-mediated alterations in the ratio of adrenal to gonadal androgens during critical stages of sexual differentiation. Specifically, it appears that stress causes an increase in the weak adrenal androgen, androstendione, from the maternal fetal adrenal cortices, or both, and a concurrent decrease in the potent gonadal androgen, testosterone."

Parental Stress Feminizes and Demasculizes the Behavior of Males, Science, January 7, 1972 (83-84).

[hellbender]

I've seen some "butch" lesbians who definitely look as if they have too much testosterone for a normal female. Since testosterone helps muscles grow and increases aggression, higher levels give some women an edge in sports. Think of the disproportionate number of female athletes who are gay: Billy Jean King, Martina Navratilova (more muscle and less fat that a typical woman)...

As for the males, there are gay males who look and act very macho.