I have an interesting question that has more to do with legality than morality - Since we own animals and animals are our property (Humans own every area in the world where animals live except for Antarctica), how to create a compelling case against bestiality when we use animals for much worse purposes?
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you


