The lab calls Mrs. Smith.
"Mrs. Smith?"
Mrs. Smith says, "Yes?"
"Are you the wife of Mr. Allen Smith?"
She says, "Yes!"
Lab says, "We have bad news for you... Two sets of labs came in last week for two different Mr. Allen Smiths, and they've been mixed up. Either way it is bad."
Mrs. Smith says, "Oh my, what is wrong?"
Lab says, "Well, it's either Alzheimer's or AIDS.
Medicare will only pay for these tests ONCE. Their recommendation is to take your husband downtown and IF he can find his way back, DON'T sleep with him!!"