Not scientific? I'll give a lesson on genetics if I need to. You have read the scientific research pointing to the extinction of red hair by some time in the 2200's, I assume.
Here's the science: H = hetero (dominant, or we're doomed) and h = homo (recessive, or we wouldn't still be here.) A given offspring gets one H or h from each parent. The only possible outcomes are HH, Hh, hH, and hh. The last pairing, hh, would result in a homosexual person, who then removes themselves from the gene pool, as they cannot have offspring with their mate. The other three go on to mate with another HH, Hh, or hH, as no hh would be attracted to them.
The results of 2 HH, hH, or Hh mates result in 5/9's of the offspring receiving at least one h. Which means that I was wrong, and the homosexual gene is more likely to be passed on than not. Or was I? It seems 4 of the possible outcomes are hh, which again remove themselves from the gene pool by falling for each other, spending a life of blissful love together, but eradicating their genes from the face of the earth in the process.
The result is in fact 4/9's of all offspring having the homosexual gene and a chance of passing it on. That's a mathematically losing proposition. The more times you take 4/9ths of a total, the smaller and smaller the population gets. "Born gay" by genetic trait is a mathematical impossibility unless the hh's are denying their true identity and mating with a member of the opposite sex. In the tens (hundreds?) of thousands of years of human breeding pre-Biblical moral influence, the gene would have eradicated itself and we wouldn't be having this discussion.
Did you really want to talk science, or were you just making chit chat? [Groundhog's Day reference]
AV
PS. Please kindly cease asking for a link and prove the above wrong. I welcome an intellectual response.