I have a friend who has a 3 year old son. He doesn't breastfeed anymore, but every night he still nurses to fall asleep. I told her that it is a bad habit, because she will get problems later on (can you imagine your child doing this through primary school..) and she should stop this asap. But she says he cries if she denies him, and so she gives in every time. Does anyone have any advice and or experience with this issue?