You've heard it from others, I see, but I'll say it too. I flicked my son's cheek as soon as he bites me. He's 13 months old and still occassionally bites. He's only got 3 teeth, but it still hurts really bad! To tell you the truth, he wasn't all that bothered by the flick, it was more my tone and scolding him, that upset him. He'd bite me, I'd say, "Ow! Marley, no bite!" and I'd flick him at the same time. And sometimes he'd laugh at me, other times he'd feel bad and start crying (he realized that he'd hurt me and felt bad about it, then I'd have to comfort him and explain that it hurt Mama, and that I wasn't angry with him, but that he couldn't do that anymore. And people say babies don't understand a lot of talk, but my son understood what I was saying.) Anyways, so when he'd laugh at me and the flicking didn't work, I would say "Marley, Stop biting Mama! That hurts. If you do it again, no more nursing!" Then he'd usually bite again a few minutes later. I'd pull him off and he wasn't allowed to nurse anymore (I usually gave in again after about 10 minutes) But he would be hysterical that I took it away. I'd explain why I did it and the next time I let him nurse, he wouldn't bite, and was actually very gentle. So, that's my advice. (Sorry, I'm long winded, I know!) Hope it helps though!