jewishfeminist02 – There is very little evidence for any kind of biological basis for same-sex attraction. Foster and non-foster twin studies have shown virtually no difference in probability (as compared to general population) of homosexuality in one twin if the other is gay, ruling out genetic and epigenetic causes. The problem for gay rights activists is that, when searching for a biological basis, the only ‘acceptable’ options are genetic or epigenetic as neurological or developmental origins would then catagorise homosexuality as either a condition or a disorder (note that these do not necessarily imply disease or illness, just deviation from ‘standard set-up’) whereas the activists need to portray homosexuality as simply another variant of the standard human set-up. Simply speaking, a neurological condition would mean that the brain functions differently to the basic programmed settings for all humanity. If we admit such, it means also admitting that heterosexuality is the default mode of human orientation and that homosexuality is, in some way, an aberration. This is something no self-respecting activist is willing to do. The same holds true with a developmental origin, as that would imply that somehow the cognitive functions of gay people developed along different lines to straight people, again requiring the ‘default mode’ being heterosexuality.
Apart from the lack of evidence, there is also the logical problem with a genetic (or epigenetic) basis for homosexuality. If, as pretty much every gay rights activist does, you believe in Darwinian (or even neo-Darwinian) evolution then how does a ‘gay gene’ propagate? In a world in which mating is purely based on attraction and there are no ‘social taboos’ on engaging in homosexual acts (as would be the case with early man) then the gene cannot be passed on as such acts cannot produce conception. No-one can be born from the mating of two males or two females, and those who would have had same-sex desires would have had no need to involve themselves in sham marriages (as many over the course of history did in fact do) as there was no pressure for them to act as if they were straight so no homosexual male would have mated with a heterosexual female (or visa-versa) to propagate said gene.
At the end of the day it is a ta’aivah. Yes, it may be a very strong one but you cannot excuse people simply on the basis of having a very strong ta’aivah. There are prisons full of murderers, rapists, pedophiles, con artists, muggers, bank robbers and burglars to prove that.