The next day, the 75-year old man appears at the doctor's office and gives him the jar, which is as empty as the day before. The doctor asks what happened, and the man explains,
"Well, doc, it's like this. First I tried with my right hand, but nothing. Then I tried with my left hand, but nothing. Then I asked my wife for help. She tried with her right hand, but nothing. Then her left, but nothing. She even tried with her mouth, first with the teeth in, then with the teeth out, and still nothing. Hell, we even called up the lady next door, and she tried with both hands and her mouth too, but nothing."
The doctor was shocked. "You asked your neighbor?"
The old man replied, "Yep, but no matter what we tried, we couldn't get the damn jar open!"