As a woman, I'm sort of fascinated/repulsed by the dog's boner. My boy is 5 months old and he hasn't started humping anything, thank god, but the pink worm comes out of it's shell every now and again for no good reason at all. I suppose this is like teenage boys who get erections for no reason (so I've been told) but it doesn't make any sense to me. Girls aren't like that (well, some aren't). I'm getting him fixed in the next month or so (waiting until he's 6 months) so I suspect he won't really get on the humping train.