The teacher in little Johnny's class is teaching them the alphabet.
"Now class who can think of a word beginning with 'A'?
Little Johnny shouts out "Arsehole !"
Teacher " No johnny, a nice word like 'Ambulance'. Now what about the letter 'B'?
Little Johnny shouts out "Bollocks !"
Teacher " No Johnny, something nice like Bumblebee, Now, I think we will give the letter 'C' a miss, so moving on to 'D'.
Little Johnny puts his hand up again.
Teacher " Last Chance Johnny!"
Little Johnny " Dwarf, Miss"
Teacher " Yes, good, Dwarf is ok, Johnny what is a Dwarf?
Little Johnny " A little cunt about 3 feet fucking tall"!