Mr. Smith goes to the dr.s office to collect his wifes test results. The lab tech says to him," 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 in as well and we are uncertain which one belongs to your wife. Frankly it's either bad or terrible."
"What do mean?" demands Mr. Smith
"Well one Mrs. Smith has tested positive for AIDS and the other for Alzheimers's. We can't tell which is your wife."
"That's terrible, can't we just do the test over?"
"Normally yes, But your HMO won't pay"
"Well then, what am I supposed to do?"

"Well yor HMO recomends that you drop your wife off in the middle of town. If she finds her way home, don't sleep with her!