Re: Homosexuality Ethically Accepted?
We know homosexuality has a genetic component to it from the concordance studies done earlier. "Being gay" isn't a singular gene, but a strange interaction of genes, epigenetics, and other environmental factors that make up the development of the individual. This explains why "being gay" exists within the gene pool, simply because it's not a simple single gene.
Darwinian theory can be used to postulate why this congregation of genes that when combined create homosexual behaviour. It's simply said that it is neutral from a genetics POV. We have seen plenty of closet gay men who have wives and kids, after all. There just isn't really any selection pressure against it, anyway.