Feminists

They think, "Oh, it's just a female dog." Well, that's only half of explanation. Every definition I've seen glides over what it really means. Why is it a derogatory term for women, what's so bad about being a dog? Dogs are mans best friend, people love dogs! Although I suppose being called trained and submissive pretty damn insulting if you think about it. But that's still not the definition.

It means a female dog in heat, that any dog can fuck. (You hope it'd be a dog anyways.) That's also where the term "son of a bitch" came from.

But that's definitely not what people think it means these days.