To those who say if it is genetics then why have they not died out:
Genetics is never, and has never been, simply passing down of genes from two parents to a child but about hortatory traits going back multiple generations, many times so far back you don't even know it is in the blood line at all. If this was not the case, and your 'they would of breed themselves to death' argument was true, we would also have no blonds, no blue eyes and no genetic diseases, no mental illnesses and a huge number of other traits believed to be genetic that still are very common unless the trait is apparent in the parent as well.
This is not the case due to something known as regressive genes.
What really happens when you see these characteristics suddenly emerge is you have actually stumbled across a regressive gene pair. These genes have been passed on through generations, laying dormant and letting the other genes do all the work until suddenly it had the chance to take control. This occurs when it is suddenly paired with a regressive gene on conception, and is no longer being over-written by more dominating characteristics.
Lets move away from sexuality for a moment and focus on something we know is genetics just to prove this point:
Regressive genes are the reason why my mother is 'black,' yet the rest of us are all white. Because aboriginal genes runs through our blood, but are regressive in this case, there is the possibility of a 'throw back.' Personally, I hate that term but it works to describe what is happening. Throw backs occur when genetics align in such a way it brings forth characteristics not seen in the blood line for generations. Many of the modern genetic diseases are believed to be such throw backs, suddenly becoming apparent as we breed more and more outside of our 'traditional' blood lines but likely there in our genes for centuries.
Skin colour is more noticeable as it is multiple genes that control it, which is why we have so many shades and why I am using it as the example here. Because the stars where perfectly aligned when my mother was conceived she happened to throw back to this aboriginal tone even though both her parents are white. Because it is regressive on this one gene pair, and she mated with my father who was white, all her children are pale as ghosts without any showing of these traits. It was just random chance that brought forth this genetic 'throw back' to the point she could easily get aboriginal assistance from the government based on looks alone if she wanted to abuse that system.
So it doesn't matter if gay people have children or not, there will always be gay people born to straight parents, possibly due to genetics.
Damn it, I learned this crap in high school... why didn't you?!
(personally, I think focusing on genes when it comes to homosexuality is mis-leading and it is more likely a combination of external factors while still in the womb and genetics controlling how well we deal with those factors)
Caption: ietardi rim ... remember, never be tardi to rim!