HELP. What do I do? He's biting me, he is nine months old and I don't want to flick him on the nose or hit him or do anything physical to "punish" him. What can I do to make him stop? He doesn't understand what he's doing, so I have tried saying "Ouch!" and "No Biting!" and "Stop", but nothing is working. He just wants something to bite and I happen to be the most convenient thing. Any suggestions?