i wanted to breastfeed (mixed feeding 2 bf 1 bottle per day) until ds was a year old. but lately he has started taking the piss (i know he's not, but ykwim?): he feeds for a bit and then pinches my nipple really hard. i pull away and say no. then opens his mouth as if to feed some more and then bites down and drags his teeth along my nipple argh. i've tried putting them away etc. to no avail. time to stop? or will he stop doing this?