Ty thought of a rather different way to go about making the world corrupt. Obviously he knew it was disgusting and would never have tried it, but he found the idea of interspecies fucking weirdly intriguing. Maybe it was just watching too many shlocky sci-fi and fantasy shows with hot alien girls and hot mythical creatures, but in any case, the idea of altering everyone's taboos was something that could be really fun to corrupt everyone.
And so, Ty wished for the world to change so that most animals experienced sexual desire for other species besides their own. Generally you were attracted to species closer to your own, so most humans would be inclined towards other mammals, but this wasn't a hard and fast rule, and some people were into different kinds of animal. The idea of consent was still just a human thing, but instead of assuming if you fucked an animal it was non-consensual, everyone now assumed it was consensual. Animals' instincts predisposed them to sex, most of them could fight you off if you tried to fuck them and they didn't want it, and some were even known to come on to humans. The most striking thing Ty decided to incorporate into this wish, though, was that every species could breed with each other- if a sperm met an egg, it could result in offspring, usually of the father's species if the sperm was male and the mother's if it was female.
Having finished this wish, Ty looked out of his window and noticed an opossum outside. He could smell she was in heat now, and realised his wish had been granted. But he wasn't sure what species he wanted to take his virginity, and figured he'd use his wish to find it...