A very old man went to the barbers for a shave. He said to the barber, "I have a hard time shaving my cheeks now, since they're so wrinkly."
"No problem." replied the barber, getting a little wooden ball from a cup on the shelf. "Put this inside your cheek to spread the skin. First on one side, then the other."
The old man does what he's told, and - a few minutes later - he's got the cleanest shave he's had in years!
"That was fantastic! But I was a bit worried I might swallow the ball."
"You don't need to worry about that." the barber said, "But should it happen, just bring it back in a couple of days like everyone else."