My LB has been doing this daily for a couple of months now and no amount of firm 'No' / putting down / trying to ignore it has made any difference. He does it to me and DP mainly but has started to do it to other family members recently. Luckily he hasn't done it to the childminder or any other children, yet!!
It is at its worse when he is tired and I think it must be a seaboard issue, perhaps it feels so nice to him when he is doing it he thinks it's a nice thing for the recipient??
I just don't know what to do about it, I'm finding it extremely difficult to cope with being physically hurt (he is surprisingly strong and draws blood) by my tiny son on a regular basis, it makes me very upset even though I absolutely know it isn't his fault and that he can't help it, he is too young to understand. We try to be gentle parents so are at a loss for what else we can do but it has to stop because it's really affecting my relationship with my son now 