The other problem is that he chews our shoes when we are not home. I don't know what to do besides hide our shoes. Now that he has ruined five pairs of shoes, this problem does not seem to be getting any better. Any help would be appreciated. I know what causes your kitty to bite, but I can only guess about the shoe chewing.
Many kitties bite when they get very excited, no matter what is causing the excitement.
There is an entire field of study into why cats bite when they are being petted. This is a common problem. There are two solutions to this problem, neither of which is guaranteed to cure it. When your cat bite, hold your hand very still and make a hight squeaky mew sound. This lets the cat know that he is hurting you, and he may stop biting.