@Anonymous Coward (@Me)
Erm, well, you could try actually reading my comment before trying to point-score.
the "norm" is to have a wide variety of sexuality, both in the human population and every other one we've found so far
It's not every day I get a chance to quote myself, as if I was a respected academic (I may be respected by my peers and be an academic, but that's a world away from a Respected Academic) so thank you for that at least.
If you still don't get it, what I was saying (referencing numerous recent studies and works in recent and no-so-recent history) is that the normal situation is to have a wide variety of sexuality in a population. Our ridiculously limited definitions of heterosexual, homosexual and bisexual don't serve us well at all in these discussions either because that's just not how life really works.
Regarding gene pool degradation, actually, more gay couples help promote gene pool diversity in many species by enhancing peer bonding and group survival and the adoption of young for rearing. Before you say "well, that's just silly penguins", I'm a "gay" whose "rearing" a couple of kids right now. With me doing that rather than our awesome care system, my two kids will have a better chance in life and a better chance of mating and passing on their great talents to the next generation.