A man is driving down a deserted stretch of highway when he notices sign that reads: "Sisters of St. Francis House of Prostitution".
His curiosity gets the best of him and he pulls into the drive. He climbs the steps and rings the bell. The door is answered by a nun in a long black habit who asks, "What may we do for you, my son?".
He answers, "I saw your signs along the highway, and was interested in possibly doing business."
"Very well, my son. "Please place $100 in the cup, then go through the large wooden door at the end of this hallway".
He places $100 in the cup. He trots eagerly down the hall and slips through the door, pulling it shut behind him.
As the door locks behind him, he finds himself back in the parking lot, facing another small sign: "Go in Peace. You Have Just Been Screwed By The Sisters of St. Francis!"