English Joke

At school Johnny's class is learning about medicines.

Catherine, d teacher, asks d students what kind of medicines they know n what they r used for. 

D 1st pupil said: 'Paracetamol ?'

'Very good! N wat is it used for?'

'It is used for a headache.'

D second pupil said: 'Eno'

'Excellent!' said Catherine. 'N wat it is used for ?'

'2 help indigestion', replied d student.

Now it is Johnny's turn n he said: 'Viagra.'

'N wat is it used for, Johnny?' asked d surprised Catherine.

'It is used for diarrhoea.'

'N who told u this, Johnny?'

'Nobody, but most evenings my mother tells my father ...
"Take a viagra, n maybe that shit will get harder.''

Class Dismisses....