GfS, let me ask you this:   why do you object so strongly to the idea that sexual orientation could be the result of a gene or combination of genes?

True, they have not yet found a definitive "gay gene" (although there are some that tend to arouse suspicion), but the research is not finished yet, and they could nail it any day now.

Recently there has been the suspicion that they might be looking in the wrong place. Perhaps the gene(s) is carried by the mother and governs the timing of the release of hormones in utero.

It's very premature to simply deny the existence of a "gay gene."

Don Firth