My son has recently taken to biting me, usually on my shoulder or leg. He will ask for a hug and then get carried away with snuggling and bite me really hard on the shoulder. I have teeth marks! I have tried telling him 'that hurts mommy' and saying 'ow' and putting him down, but he thinks it's a game. He's 14mths. I think it happens more when he's tired and when he wants to nurse, but he has other ways of asking so I'm not sure why he does this, especially since I don't reward him for this behavior by nursing him. Has anyone else had this trouble? Thanks.