97 year old man comes to his doctor looking depressed.
He says "Doc, I think I'm impotent." Doctor sits him
down and begins the standard speech he gives to senior
citizens, about how as the body ages bodily functions
slow down and it is completely normal to suffer some
decrease in sexual desire. How the man shouldn't worry
or become upset about it, but should just relax and
things will probably be completely fine and blah blah
blah. Finally the doctor asks "When did you first
begin to think you were impotent?"

"Three times last night, and again this morning."