The teacher announces, "The topic of the day is describe your mother to me as a bird, and tell me why."

She leaves the kiddies for a short
while and then asks them their answers.

Kelly at the front goes first, "My Mummy's like a swan,
because she's pretty and elegant."

"Thank you, Kelly," says teacher, and she continues
going around the class.

Bobby says, "My Mummy's like a stork, cos she has babies and babies, and I have 7 brothers and 3
sisters."

"Thank you Bobby," says the teacher, and continues
with the other students.

Finally there is no one left but Little Johnny, so the teacher finally asks him, "Johnny, what bird most
resembles your mother?"

Little Johnny pipes up with, "A thrush!"

The teacher, thinking she may finally have a decent
answer asks,
"Why is that?"

Little Johnny replies, "Because she's an irritating
cunt."