My kitty, Spidey, likes to be on you. But he also gets very scared if he thinks he is falling and many times when he jumps on you, he doesn't quite make it. When he is falling off or didn't quite make it, he hangs on with his claws. It really hurts. He scratches me through jeans. He is really careless with his claws, and yes, I trim them. He just has no clue. I've tried to show him the blood and make him smell it, thinking that would help, but still, clueless. He doesn't really get 'no' either. Any suggestions? He's killing me!