Has anyone got any good tips for getting my 4 weeks old to take a bigger mouthful of boob? He is such a greedy feeder that my nipples are now very long and he will only grab the nipples and not the aerola...it bloomin hurts and cant be productive for him. I have tried waiting until he is genuinely hungry and not just fancying a snack - it helps initially but as he gets to the slower sucking he relaxes and goes back to chewing the ends. Any tips?