An eighty year old man went to the doctor for a physical. The doctor pronounced him in fine shape, but the old geezer asked to have a sperm count done. "I don't think that's necessary," said the doctor. But, the old geezer insisted, so the doctor gave him an empty bottle and instructed him to fill it up, and then to bring it back the next day.
The next day the old geezer returned with an empty bottle. "What happened?" asked the doctor. "Well, I tried with my right hand, and I tried with my left hand... my wife tried with her right hand, and she tried with her left hand... she tried with her teeth in, and she tried with her teeth out..." explained the old geezer.
"And?" pried the curious doctor. "Well, we never could get the damn lid off the bottle!"