Johnny was watching an adult movie with Mary. Johnny gets a hard-on.
Obviously, Mary started asking right away "Johnny what is that?" while pointing at Johnny's dick Johnny being busy with other stuff answered quickly "That's a stork"
Mary is still bored and starts asking again "What is that?" while pointing at Johnny's balls Johnny then answers "Those are storks' eggs".
Mary is still intrigued "But Johnny what are these?" while pointing at the pubic hairs Johnny isn't bothered by Marys stupid questions and says "That's the storks nest. Leave me alone already!"
The next day Johnny wakes up in a hospital bed and his groin is so painful.
Noticing Mary, he asks "Mary, what happened to me?" Mary answers "Johnny, I played with your stork yesterday but it spat in my face! I got very angry, I broke the stork's neck, smashed its eggs and set the nest on fire".