>>107613661People fucking animals(or animal spirits) is one of the most popular subjects of neolithic cave paintings. Every religion is full of animal-human hybridism. What the fuck do you think an angel is, let alone all of those weird Hindu gods? You can lust after a half-fish woman, or a catwoman, or a batwoman, but the only reason people don't point out how weird that shit is is because in general there's not a huge cultish base of pervs inflicting those particular fetish upon the public(There are plenty of people who think they're vampires but they tend to stay in their darkly-lit bars smoking cloves).
As long as I'm not jamming my cock in an actual goat then it's just another fetish. Nothing sick about it. Unless you want to consider all erotica and the act of self-pleasure sick, which I guess they are.