As they get older, they become very keen to please and desperate not to upset you. I never had a biting problem with Dylan except for a little with my daughter, but that was her fault as she used to deliberately wind him up! But on the rare occasion if he plays a little rough and hurts me by accident, if I yell out and tell him off he immediately becomes really crestfallen and snuggles up to make amends. It really upsets him to have hurt me. They do become very sensitive.