Old folks

An elderly couple, she was 85, he was 90, decided that they would take
advantage of modern science to conceive another child. They discussed it
with a fertility expert who said it was indeed possible. The doctor
gave the couple a jar and asked them to return a semen sample the next day.

The next day, the couple presented the doctor with an empty jar. The husband
apologized, "I tried my right hand...I tried my left hand...My wife tried
her right hand...My wife tried her left hand. She took her teeth out
and used her mouth....

....we still couldn't get the lid off the jar."