Quoting D♥'sK:" See about two months ago I we tought him how to pat the table and his drums. I think he supposes it's a all the same. The pulling hair thing is the worst!"
We use to laugh when our son would pat our chests when he was younger. He is 12 months now and he literally slaps your face lol I don't think he realizes he is actually hitting though.. That is our fault though. I just try to grab his hand and say no hitting, be gentle and then redirect him. He pulls hair sometimes but not too often.