Mr. Jones has done the 'love bite' thing since we got him almost 2 years ago.
I have greatly reduced it's frequency by giving him the 'opportunity' to bite my knuckle and then if he goes for it, I push my knuckle into his mouth. He does not this at all. So, I know it's negative reinforcement but it works and it doesn't hurt him, he thinks: gee, this it unpleasant.

I would never raise my hand to my cats.