Viagra Joke

Teacher asks kindergarten students what kind of medicines they know and what they are used for.

First pupil:'Tylenol?'
Teacher: 'Very good! And what is it used for?'
Pupil: 'It is used for headaches'

Second pupil: 'Nytol Teacher'
Teacher:'Excellent. And what it is used for?'
Pupil:'To help you sleep'

Now it is Johnny's turn and he says: 'Viagra'
Teacher, slightly shocked:'Johnny, What do you think is it used for?'
Johnny:'It can be used for diarrhea'
Teacher: 'Who told you this?'
Johnny: 'Nobody, but every evening my mother tells my father
'Take a Viagra, maybe that little shit will get harder'.