I posted earlier when we first got him (about 5 months ago) and he was a new baby and very beaky. He grew out of that since and for the past 4ish months has been super sweet, not biting at all. Recently he has started biting my fingers. He will come over, climb up on my hand and start biting on my fingers. It won't be hard at first, but he will bite down enough that it hurts quite a bit but has never drawn blood. I move my hand a little bit and he will stop for a second, then latch on again. I've tried offering him other things to chew, and I'll hold stuff in my hand and redirect, and he'll chew the other stuff for a second but goes right back to my fingers. It doesn't seem to be aggression, but when I redirect he will sometimes scream at me. What do I do about that?