Don't worry, Jake isn't really strange at all. One of my cats and several of my parents' nine cats do this. I'm not completely sure of the reason. I read somewhere that some cats have very sensitive skin that can become irritated from very little petting. I also heard that certain cats are just too excitable and can't sit still when they're given loves. As long as he's playing and doesn't seem agitated it probably isn't a problem. When he becomes really upset then he may need a break from touching. With my biter, I try not to pet in one spot for too long. (Out of curiosity... is Jake Siamese, because I heard they're more prone to this behavior) Good luck saving your hands. PS. If the biting is just a problem because its painful for you, try wearing a mitten or soft oven mitt. These feel good to the cat and they can bite them as much as they want. I even saw a fuzzy mitten in the cat toy section of my local Petco just for this.