One day, Jeffrey complained to his friend, "My elbow really hurts, I
guess I should see a doctor."

"Don't do that! There's a computer at the drug store that can diagnose
anything, quicker and cheaper than a doctor. Simply put in a sample of
your urine and the computer will diagnose your problem and tell you
what you can do about it. It only costs $10."

Jeffery figured he had nothing to lose, so he took his urine sample to
the drug store. Finding the computer, he poured in the sample and
deposited the $10.00. The computer started making some noise and
various lights started flashing. After a brief pause, out popped a
small slip of paper on which was printed:

"You have tennis elbow.
Soak your arm in warm water.
Avoid heavy lifting.
It will be better in two weeks."

Late that evening while thinking how amazing this new technology
was and how it would change medical science forever, he began to
wonder if this machine could be fooled. He decided to give it a try.
He mixed together some tap water, a stool sample from his dog and
urine samples from his wife and daughter. To top it off, he
masturbated into the concoction.

He went back to the drug store, located the machine, poured in the
sample and deposited $10.00. The computer again made the usual noise
and printed out the following message:

"Your tap water is too hard.
Get a water softener.
Your dog has worms.
Get him vitamins.
Your daughter's using cocaine.
Put her in a rehabilitation clinic.
Your wife's pregnant - twin girls.
They aren't yours.
Get a lawyer.

And if you don't stop jerking off, your tennis elbow will never get
better."