Bob complained to his friend, "My elbow really hurts. I guess I should see a doctor." His friend offered, "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. And, it only costs $10.00" Figuring he had nothing to lose, he filled a jar with a urine sample and went to the drug store. Finding the computer, he poured in the sample and deposited the $10.00. The computer started making some noises and various lights started to flash. After a brief pause, a small piece of paper popped out, on which was printed: You have tennis elbow. Soak your arm in warm water, avoid heavy labor and it will be better in two weeks. Late that evening, while thinking how amazing this new technology was and how it could change medical science forever, Bob began to wonder if the computer could be fooled. He decided to give it a try. He mixed together some tap water, a stool sample from his dog, urine samples from his wife and daughter, and to top it off he masturbated into the concoction. He went back to the drug store and poured the sample in while depositing his $10.00. The computer began making the usual noise and printed out the following analysis: Your tap water is hard. Get a softener. Your dog has worms. Give him vitamins. Your daughter's on drugs. Put her in rehab. Your wife's pregnant. It ain't your's, get a lawyer. If your don't stop jerking off like that, your elbow will never get better.