95yo man is given a jar to providea sperm sample for analysis at hospital.
He turns up two days later with an empty jar.
Nurse asks why no sample?
He says, sorry i tried with my right hand, then my left hand! Then my wifetried with my right hand, then my left!
Then my wife tried with both hands! Then with her mouth, first with her teeth in, then with them out!
Then we got Ethel from next door to try!
But it was no good, we just couldnt get the lid off the jar!!
If at first you don't suceed...Destroy all evidence you tried! - Good On Ya Chap