At school, Johnny's class is learning about medicines..

Teacher: What kind of medicines do you know & what are they used for..

1st student: 'Paracetamol.. It is used for a headache.'

Teacher: Very good..

2nd Student: 'Restyl.. To help you sleep'

Teacher: Great..

Johnny: 'Viagra.. It is used for diarrhoea.'

Teacher: And who told you this, Johnny?'

Johnny: 'Nobody.. But most evenings my mother tells my father, "Take a viagra & maybe that shit will get harder."