The barber gets a little wooden ball from a cup on the shelf and tells the cowboy to put it inside his cheek to help spread out the skin.
When finished, the old cowboy tells the barber, "Man! That's the cleanest shave I've had in years.. But tell me, what would have happened if I had accidentally swallowed that little ball??"
The barber replied, "Just bring it back in a couple of days like everyone else does.."