A guy went to the doctors complaining of a sore elbow. The doc told him that he can determine any ailment with a new machine he has in one minute with just a urine sample. So the guy goes home with the cup and puts a urine sample. To test the doc's new machine, he also gets a urine sample from his wife and daughter and put them in it also. He then get a couple drops of oil from his car and masturbates in it.

The next day, he goes back to the doctors office and hands the doc the cup. The doc says OK, in 1 minute I'll have your results. In one minute, the machine prints out a piece of paper. Sitting there with a smirk on his face, he says "Well Doc, what does it say"? The doctor says to him "Well, your wife has VD, your daughter's pregnant, your cars ready to throw a rod and if you don't stop jerking off, that tennis elbow is never going to get any better"!

very funny