Mrs. Ward goes to the doctor's office to collect her husband's test results.
The lab tech says to her, "I'm sorry, ma'am, but there has been a bit of a mix-up and we have a problem. When we sent the samples from your husband to the lab, the samples from another Mr. Ward were sent as well and we are now uncertain which one is your husband's. Frankly, the news is either bad or terrible."
"What do you mean?" Mrs. Ward asked.
"Well, one Mr. Ward has tested positive for Alzheimer's and the other for AIDS. We can't tell which is your husband."
"That's terrible! Can you do the test over?" questioned Mrs. Ward.
"Normally, yes. But you have an HMO, and they won't pay for these expensive tests more than once."
"Well, what am I supposed to do now?"
"The HMO recommends that you drop your husband off in the middle of town.
If he finds his way home, don't sleep with him."