This 90 year old man and woman decided they wanted children, so they
went to the doctor to see if it was possible.

The Doctor said he didn't know why they couldn't if he was still
fertile.

He gave the man a jar and told him he needed a semen sample.

A few days later the man returned to the doctor's office quite angry,
and threw the jar against the wall, smashing it to bits!

The Doctor asked him what the problem was.

The man replied, Doc I tried
with my left hand, I tried with my right hand, I tried with both hands.
My wife tried with her left hand, she tried with her right hand, she
tried with both hands. She tried with her teeth in, she tried with her
teeth out! But Doc, we couldn't get that Damn lid off!!!!!