Give your cat a scratching post. If your cat is constantly scratching you or pieces of furniture, there's a chance that he's doing it because he needs to scratch. A cat scratches household items to mark his scent on that item (using glands in his paws), and to remove the sheath that naturally grows over his claws. Giving him an outlet, like a scratching post, to satisfy his scratching needs should alleviate some of this problem behavior.