Boys are thought to be more affectionate. On the other hand, girls have much better outfit options! Which do you want more, love or fashion?
Re: humping. Thor has never humped, but he does sometimes, ah, orally pleasure himself. And he likes to mark outside. I never thought I would get a boy dog because I didn't want to deal with that stuff. The thing is, when its YOUR dog, it's no big deal. The grossest things about dog is their poop, and there's no getting around that one, sadly.