The madam says, "Bubba, you've been such a good customer over the years, I'm going to see to your son personally."
So the madam takes Billy Bob by the hand and leads him upstairs where she completes his deflowering. Later, as they are walking downstairs the madam says, "Since this is your first time, I'm going to see that you get the full treatment before you leave, I'm going to give you a manicure too."
Two weeks later Bubba and Billy Bob run into the madam on the town's main street.
Billy Bob is acting a little shy, so the madam smiles and says, "Well, Billy Bob, don't you remember me?"
"Yes, ma'am," the he stammers. "You're the lady that gave me the crabs and then cut off my fingernails so I couldn't scratch 'em."