I have a boy that goes in spurts. Today he very casually walked over to an older girl and leaned over and bit her arm. Totally no reason for it. Of course mom/grandma blame it on teething because he only seems to do it when he is teething. Sigh....luckily I have a 3 day weekend and he is gone for all of next week as well! Maybe he can get it out of his system before he comes back.