Mrs. Smith needed to have her piano tuned so she asked a friend for a recommendation.  She then made an appointment with the piano tuner, Mr. Oppernockity.  He arrived 2 days later, tuned the piano satisfactorily, and left.  Several days later Mrs. Smith noticed that the piano was terribly out of tune again.  She called the tuner to complain about the tuning and to ask for a return visit to solve the problem.  However, the tuner replied, "I'm sorry ma'am, but Oppernockity only tunes once!"

Q: What's the difference between a piano and a Harley-Davidson?

A: One of us might be able to tune a Harley.

Q: What's the difference between a piano and a fish?

A: You can't tuna fish.

Definition of a piano tuner: A person employed to come into the home, rearrange the furniture, and annoy the cat. The tuner's chief purpose is to ascertain the breaking point of the piano's strings.

Piano Tuner: I've come to tune the piano.
Music Teacher: But we didn't send for you.
Piano Tuner: No, but the people who live across the street did.