We've tried to teach him to pat/stroke hair instead of pulling it, and this sometimes works, but he frequently just really wants to pull on our hair.
He's also recently started biting; as far as I can tell, he's biting because it's fun. He doesn't seem to be interested in biting alternative objects, just people. These activities are related, in that he seems to get into moods where he wants to do both of these things.
I'm not entirely happy with the way I'm handling this right now, because when he won't stop biting or pulling hair, I wind up putting him in his crib or across a baby gate to separate him from me and his sister (so he can't keep trying to bite us and/or pull our hair). I generally stay with him (but physically separated from him) for a few minutes unless his sister needs help with something, like getting dressed. I find that taking a short "break" of this type does end the biting/hair pulling mood, but I'm wondering if I'm missing a possible solution that doesn't involve physically separating him from the rest of the family.
How have you handled this situation?