>>13676946Early childhood development often informs one's later sexual proclivities. In antiquity, a very common form of homosexual behavior was the mentor-supplicant role. Many accounts of older men turning young boys - often prepubescent - into sexual orifice. This likely changed the plasticity of their minds within sexuality; in turn, they'd reciprocate in kind at a later age. Thus, a perpetual cycle. No doubt this also occurred amongst women as well, but the accounts are far more spares in documentation.
With the advent of Christianity, and later Islam, we would see a massive repression of such behavior; only reserved for the seedy underbellies of society. Cut to present time, in the west, we now see a reduction in aforementioned religious doctrine, and in so, a reemergence of the latter proclivities. Not only, but with the advent of pornography and the internet, exacerbate the affliction.
The really is, homosexual is likely both nature and nurture alike. How much nature and for what reason - no idea; but I have no doubt we're seeing an uptick do to forces both willing and wanting to spread it.