An 85 year old man visits his doctor to get a sperm count. The geezer's given a jar and told to bring back a sample. The next day he returns to the doctor with an empty jar.

"What happened?" says the doctor.

"Well," the old man starts, "I asked my wife for help. She tried with her right hand, then her left -- nothing. Then she tried with her mouth, first with her teeth in, then with her teeth out, still nothing. We even called Evelyn, the lady next door, but still nothing."

The doctor bursts out, "You asked your neighbor?"

"Yep, No matter what we tried we couldn't get that damn jar open."