At school little Johnny’s class is learning about medicines.
Sister Catherine, the teacher, asks the students what kind of medicines they know and what they are used for.
The first student said: “Tylenol?” “Very good!
And what is it used for?” “It is used for a headache.”
The second student said: “Nytol.”
“Excellent!” said Sister Catherine.
“And what it is used for?” “To help you sleep”, replied the student.
Now it is Johnny’s turn and he said: “V***gra.”
“And what is it used for, Johnny?” asked the surprised Sister catherine.