Medicine

The lady teacher asks the pupils what kind of
medicines they know and what they are used for.
The first pupil said: Tylenol?
Very good! And what is it used for?
It is used for headache.

The second pupil said: Nytol
Excellent. And what it is used for?
To help you sleep

Now it is Johnny's turn and he said:Viagra
Johnny. What is it used for?
I think it can be used for diarrhea.
Who told you this?

Nobody, but every evening my mother tells my father
'take a Viagra, may be that little shit will get harder'