Mr. Smith goes to the doctor's office to collect his wife's test results.
After much digging and fumbling through papers, the receptionist looks up with a troubled look and says, "I'm sorry, sir, but there has been a bit of a mix-up and we have a problem. When we sent the samples from your wife to the lab, the samples from another Mrs. Smith were sent as well and we are now uncertain which one is your wife's. Frankly, that's either bad or terrible."
To which Mr. Smith says furiously, "What do you mean?"
The receptionist then tries to explain... "Well, one Mrs. Smith has tested positive for Alzheimer's disease and the other for AIDS. We can't tell which is your wife."
Mr. Smith yells, "That's terrible! Can't you just do the test over?"
The receptionist obviously trying to be apologetic says, "Normally, yes.
But you have an HMO and they won't pay for these expensive tests more than once."
Mr. Smith sighs and says, "Well, what am I supposed to do now?"
The receptionist replies, "The doctor recommends that you drop your wife off in the middle of town. If she finds her way home, don't sleep with her.