Well Calidore suggested that it would make the pedophile more likely to rape/abuse young human girls, but I'm not so sure it isn't actually the opposite. Currently cartoon (as in drawings of girls) pornography featuring underage or very young girls is illegal, which I also find hard to understand.
I would definitely legalize prostitution even if they didn't necessarily work for themselves, though with the social media options we have these days it wouldn't be hard to self start/work for yourself.
Same question.

