One day in school, Little Johnny was learning about the weather.
The teacher asked, "Class, can any one tell us what animal is usually depicted as a weather vane?"
Little Johnny's said, "Yes, they use a cock as a weather vane."
The teacher replied, "That's right Johnny, can anyone tell us why they use a cock?"
And Little Johnny said, "Yes, if they used a pussy then the wind would whistle right through."