They're really weird and lots of them are gay so the social mechanisms that stop us giving groups a lot of shit for no good reason are weaker for them. This is

They're really weird and lots of them are gay so the social mechanisms that stop us giving groups a lot of shit for no good reason are weaker for them. This is not a particularly comforting explanation, but I'm unaware of a better one (and I've discussed this with a bunch of smart furry friends over the years).