A barber gave a haircut to a priest one day. The priest tried to pay for the haircut, but the barber refused, saying, “you do God’s work. “
The next morning the barber found a dozen bibles at the door to his shop.
A policeman came to the barber for a haircut, and again the barber refused to pay, saying, “you protect the public. “The next morning the barber found a dozen doughnuts at the door to his shop.
A lawyer came to the barber for a haircut, and again the barber refused payment, saying, “you serve the justice system. “
The next morning the barber found a dozen lawyers waiting for a free haircut.
This joke is included in the Black Book of Jokes. You can order it from here.