A barber gave a haircut to a priest one day. The priest tried to pay for the haircut but the barber refused saying "I cannot accept money from you, for you are a good man - 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 payment saying "I cannot accept money from you, for you are a good man - 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 "I cannot accept money from you, for you are a good man - you serve the justice system."
The next morning the barber found a dozen more lawyers waiting for a haircut.