OOOOH! Yes. That's another good point that I never even thought about. I just naturally never used my hands, because I don't like it anyways, but I always used a feather on a stick/string.
Another thing I never use is laserpens. I used to. I feel bad that I ever did. It's fun, but then you learn that cats play is only stimulating their hunting drives. And since they can catch the feather on a string, they feel a sense of satisfaction for having caught it. Whereas they can't catch a red dot. So never catching it apparently gives them PTSD. They feel depressed that they can't be good hunters if they can't catch the red dot.