Great question!...Because the wannabe political jerks, are using them, and over-hyping the significance, and building their case on bad science.
That's the short answer..but the truthful one.
It's not genetic, but behavioral...but the wannabes will argue till they're blue in the face otherwise.
It is a breakdown of the nuclear fabric of society, which they promote, and frankly, a tempest in a teapot, which they exaggerate to no end. Maybe it's a way of showing off how 'liberally minded' and 'hip' they are..but really, who cares?
If we get too far into it, another thread will be screwed up with our local defender of homosexuality, to excuse his irresponsible behavior, in his younger and reckless days.....and I'm hoping we don't go there, AGAIN!!..(so I won't name names) being as this thread is about 'Reinforcing respectful 'boundaries'.
BTW, Akenaton, for a long time has posted stats, and many from the CDC, only to be shouted down, and called exaggerated names, blasting his character...none of which has been true...and it's from the usual moronic ideologues, who promote sexual permissiveness, wishing to resurrect racial baiting, want higher taxes, limited freedoms, on a crusade to eradicate any mention of anything resembling 'God' OR Spiritual, and favor a massive big brother/nanny-state government, hate anything to do with Israel, (which ironically is more tolerant of homosexuals than their counterparts in the Mid-East), and more than often, are so contradictory, it's staggering to the imagination that they can even wake up and dress themselves.
What I think it really is, is that a lot of the present political movements originated in the backlash to the industrial revolution, so that is their point of reference...and they are trying to belatedly apply it to today, is in a backlash to the technological revolution...and they're absolutely lost!...so they scream, piss and moan about anything traditional, and do more screaming, pissing and moaning, accusing anyone who doesn't go along with their semi-literate diatribes, as being some sort of hater, bigot, homophobic, misogynists...or whatever their frustrations can't wrap their brains around!....

Oh well, I'll stop now, trying to keep in mind that this thread is about, 'Reinforcing respectful 'boundaries'.

Now watch, all the frothing, foaming, blatherers, will fill up cyberspace with their histrionics!
Go for it!!

GfS

P.S. SJL, did that answer your question?