DD used to do this when her teeth first came through at about 7 months. I solved it by saying "Ouch" really loudly and crossly (quite easy to remember to do that ), and putting her straight down onto the floor, at which point she usually started crying. I only left her there for a couple of minutes before starting to feed her again, but it worked for me. Maybe your DS is a bit more persistent though....
He is only 5 months, i wasnt sure if he would understand that he was being put down because he bit me? IS he old enough to link the two yet? Ive tried saying Oww loudly (it hurts, os thats not hard!) but thats when he grins at me
I definitely think he's old enough to understand the link - after all he's old enough to find biting funny! I just think at the moment it's a game to him (he bites, you say oww and he thinks that's fun). You've got to make sure it's not fun - I did it by saying ow loudly crossly which shocked DD a bit and immediately put her down on the floor, also quite crossly, and kind of told her off. (I don't mean I felt particularly cross, just that I seemed cross as I wanted to shock her a bit so she didn't think biting was fun!)
Gosh, putting it down in writing makes it sound very mean, but I honestly don't think it was, I just needed her to understand it wasn't a nice thing to do. Obviously babies are too young to explain things to, so they need to be shown clearly. She only did it a few times, so she learned really quickly not to bite.
If they are biting they arn't feeding (as when feeding their tongue is over their teeth. so you are not being cruel taking them off. It sounds like a game to me. both of mine did this but only when they were teething (they also liked to sink their teeth into anything else that came into contact with their mouths at this point.) I just said no sternly and put my boob away and had a 3 times and off rule (if they did it 3 times they were not offered it again. sorry to ramble just hoping to help
DS2 (4 1/2 mo) is doing this as well! And he already has 2 teeth to sink into my poor nipple.... Have tried taking him off but, like the OP, that's when he laughs Maybe I need to be a bit more forceful with taking him off? He definitely thinks it's fun - ooowww! Any more tried and tested tips out there? (DS1 didn't start teething until 8mo and I had stopped bf a few weeks earlier, so this is all new)