E.W.
Okay, I am not recommending this...but it worked on my brother. He used to bite his one friend all the time, one day the mom of the boy said, "I'm going to bite him back". She did and he never bit again...She didn't leave marks or anything and now she would probably be arrested but it is a funny store I thought you might like to hear. PLEASE DONOT THINK I AM TELLING YOU TO HIT or KICK BACK!
Again, this is just a story to share...