He has just started to do this in the last few days, I think perhaps due to teething (?) as he got his 1st tooth 2 weeks ago and his second one has just broken through today. It is so sore though and he does it now and then, he will clench it with his teeth and then turn his head while it's still clenched aararrgggghhhhh. I take him off the nipple and say a firm 'NO' but he then just smiles and gives a little giggle as he thinks mummy is being funny and I then need to turn my head away as I'm trying not to laugh!
I don't know what to do or how to react- tonight he has done the same during the bedtime feed so I eventually put him to bed fully awake with half a feed and now he is wailing!!!
HELP!