>> Also, to back up the fact that this is not just 'nowadays,' I would like to bring up the fact that Greek, Nordic, and Celtic mythology are all rich in bestiality.
Greek anon here. Beastiality is only one of the many fetishes you will meet in greek mythology. Take Oedipus complex for example.
And then they say that hentai is the source of all fetishes. Meh! Noobs! XD