Man goes into a barber shop and sees a lady barber there -- it's the local Baptist pastor's wife, Grace.
She shaves him and charges him $50. He's shocked at the price but still pays. It's a good shave and it's still smooth a week later, so the man is pleased -- it's even smooth for 2 more weeks. When the man finally goes to the barber lady after a month, he says -- "boy your price is high, but it's worth it."
The barber looks at him and says "
You were shaved by Grace. Once shaved, always shaved."