The doctor, laughing to himself, asks if there's any particular reason the gentlemen feels he needs this information.

The man tells his doctor that he read an article about it, and he's just curious to see if he's doing well. The doctor agrees to do the testing, and gives the old man a specimen jar. He tells the man to go home and get him a sample to test.

Weeks later, the doctor still hasn't heard from his patient, but sees him in the Post Office one afternoon. He approaches the old man and asks if he's changed his mind.

"Oh, no", the man says, "I'm just having some trouble getting the sample to you." The doctor listens as the man explains, "I tried my right hand - couldn't do it. Tried my left hand - couldn't do it".

"After awhile, I called my wife in. She tried first one hand, then the other. She tried both hands at once. She tried to do it with her teeth in, and then tried it with her teeth out."

"Doc, I don't know what to do - we just CANNOT get that lid off that jar!"