A man went into a dentist and said "how much will it cost to have teeth taken out" "$90" said the dentist "that’s ridiculous" said the man.” I could lose the anesthetic and it would cost $60" "that’s still to expensive,” said the man "if I don't use any anesthesia I could knock the price down to $20". Still to much" said the man.” Well one of my students can do it for $10" said the dentist "perfect" said the man "book my wife for next Tuesday".