Also *some* cases of homosexuality may be due to a chemical imbalance while in the womb, but there is no way that 5 or 10% of the worlds homosexual population were born in this way. It's just not possible. So with that said a small percentage may have been born homosexual, but the majority probably have made some unconscious choice during their life. There is also no reputable evidence of a gay "gene". There are some finding with homosexual identical twins seperated at birth, however the finding are NOT reproducible which leads people to believe that the choice of twins was not random.