The new sperm was receiving instructions from the boss sperm. “When you hear the siren, head for the tunnel, swim until you get to the entrance of a damp cavern, swim to the end of that cavern where you will find a sticky red ball. Address that egg, saying: ‘I am a sperm’ and it will answer, ‘I am an egg.’ From then on you’ll work together to create an embryo. Understand?” The sperm nodded. A few days later, the sperm heard the siren. He went to the tunnel with millions of sperm swimming behind him but he vowed to arrive first. He swam through the cavern and finally approached the sticky red ball. He smiled and said, “Hi! I am a sperm.” The sticky red ball said, “Hi! I am a tonsil!”