The newly born sperm was receiving instructions in conception from the instructor.
"As soon as you hear the siren, run for the tunnel and swim in a straight line until you get to the entrance of a damp cavern. At the end of the cavern you will find a red, sticky ball which is the egg.
Address it and say, "I'm a Sperm." She will answer, I'm the Egg." From that moment on you will work together to create the embryo. Do you understand?"
The sperm nodded affirmatively and the instructor said, "Then, good luck!"
Two days later, the sperm is taking a nap when he hears the siren. He wakes up immediately and runs to the tunnel.
A multitude of sperm swim behind him. He knows he has to arrive first. When he nears the entrance to the cavern, he looks back and sees that he is far ahead of the other sperm.
He is able to swim at a slower pace but does approach
the red, sticky ball.
When, at last, he reaches the red, sticky ball, he smiles and says, "Hi, I'm a sperm."
The red sticky ball smiles and says, "Hi. I'm a tonsil."