Hi all. My grandson, who is seven in age only and needs 24/7 care, has discovered masturbation. He will hump the couch or get under mats on the floor and will hump himself into a sweaty frenzy. He isn't punished but told to sit on his butt and he will but if left to his own devices he'd rub himself raw. Has anyone dealt with this. How do you teach them when it is appropriate and when it is not?