THis is a problem my friend is having - honest. She has a 4 1/2 week old son and she says he has such a strong suck that she often has to bite down on her hand while feeding him. She has a three year old boy who she fed easily. She thinks it may be that her boobs are quite big and the LO can't get enough boob in his mouth so he is just yanking in the nipple. Does anybody have a similar experience/advice?