The next time he picks up something, say in your best shocked voice, "George! (or whatever his name is) I KNOW your parents taught you to look with your eyes, NOT with your hands.
That ought to embarass him right quick and put an end to the problem.
That's what MY parents always said to us anyway. Seemed to work.
Good one!
I can do school marm voice.
Frends know gud humors when dey is hear it. ~ Da Crockydiles of ZZE.