The wooden ball:

An old man walks into the barbershop for a shave and haircut, But he tells the barber he probably can't get all of his whiskers off
because his cheeks are wrinkled from age. The barber gets a little wooden ball from a cup on the shelf and tells him to put it inside his cheek to spread out the skin. When he's
finished, the old man tells the barber that was the cleanest shave he's had in years. But he wanted to know what would have happened If he had swallowed that little
ball. The barber replied, "Just bring it back in a couple of days like everyone else does..."