Ah, but the hormones block receptors in the CNS, which can effect behavior and change the way the brain is wired, especially in developmental stages. Synapses function very differently in the hypothalamic axis, as them being 'on' or 'off' can create huge chemical changes throughout the rest of the brain. Not all synapses deal with sensation and input, a lot of them have to do with chemical output and neuroendocrine function. Its very possible that hormones, say progesterone, at a very young age, could block the synapses in the CNS that regulate sexual attraction, and the non-development or mis-development of this center could self maintain itself via those same extra chemicals.
And while we're starting to get a grasp on what the various hormones and chemicals produced and ingested by our bodies do, we are still only on the tip of a iceberg. We still have no idea how much of what dictates behavior actually works, we just know what chemicals are somehow involved. The compounds may be known, but the pathways are the complex and intricate part that will take us many years to completely map out.
As for a homosexualty gene, I didnt say anything about that. Homosexuality doesnt seem to be genetically passed down, but there could very well be a mutation that randomly occurs in some part of the genome during early development that could effect development or something. We really dont know what a vast majority of our genome actually does, so its more than reasonable to assume that homosexuality may have something to do with it.
My basic point is in agreement with the thread starter. We really have no idea how to dxplain homosexuality. Its definitely not a conscious 'choice', despite what you may like to believe, but exactly how the brain is different in these individuals is still unknown. If it follows any of the previously discovered patterns of studied behavior, such as aggression and territoriality among animals, it probably has many contributing factors. Everything from hormones, changes in development, upbringing and subsequent wiring of the brain, environmental factors or even as mentioned before, ultimately genetic. Its not likely to be just one of these if animal models have taught us anything about this kind of biology. However, its just speculation, so we'll have to wait to see what scientists discover.
|| - Rowen