Sure, in the beginning it can seem fun. You find out all of the things you have in common - growing up in the same place, you both love swimming, stuff like that. You stay up all night having long philosophical talks about why the world is the way it is. You really enjoy hanging out together.
But then, the teeth come out and you realize there is no happy ending. Well, for one of you.
A reminder to pay attention to red flags, Jonathan!