This article in Scientific American would seem to lend support to the theory that homosexuality is not entirely a choice, at least not always. The interesting thing about the genetic theory of homosexuality is, that if it’s correct, is going to imply quite a bit about the number of homosexuals within the population.
Much like the laws of thermodynamics, natural selection is a bitch. Genetic traits that interfere with reproduction don’t get passed on to future generations, and eventually work their way out of the gene pool. This would mean the number of homosexuals should be a good bit smaller than is often claimed (I’ve heard 10% bandied about). If they are high, there needs to be an explanation as to how the trait is continuing to propagate within the population. It’s quite possible it propagates because many homosexuals, because of social pressure, live heterosexual lives. If this is the case, increasing public acceptance of homosexuality should actually reduce their numbers (let’s see the Moral Majority types try to wrap their heads around that one). It’s also possible it propagates through the general population, but gets activated by other factors. I don’t think we really understand enough to make a certain conclusion, but a genetic root for homosexuality should mean the number of genetic homosexuals should be quite small.
Hat Tip to Instapundit for the link.