I figured something out.
I can't put him down when he's sleeping because after about 20, 30 minutes he wakes up.
I think he gets most of his nutrition by sleep eating. It's the only time he's not distracted. He can get a few good nursings in, but usually only when he's nursing to sleep. He eats frequently while sleeping - even during naps.
I think it's cool, actually. I'll get over that soon, I'm sure ;) I just like that he can get what he needs even if it takes eating while sleeping.
So adults who "sleep like a baby" will be very fat, if they sleep like mine ;)