Man goes to see dentist and asks "How much to pull two wisdom teeth?"

Dentist says "$100.00."

Man says, "too much. Can't you do it for less?"

Dentist says "I can do it for $50 if I cut out the novacaine."

Man says, "that's better but still too much. Can't we do it any cheaper?"

Dentist says, "I could let my trainee do it for $20 but she has never pulled a tooth before and it would be quite painful."

Man says, "That's great. Schedule my wife for next Tuesday."