Stanley himself was a very healthy sperm. He would do push-ups and somersaults and limber himself up all the time, while the other sperm just lay around on their fat asses not doing a thing. One day, one of them became curious enough to ask Stanley why he exercised all day.
Stanley said, "Look pal, only one sperm gets a woman pregnant and when the right time comes, I am going to be that ONE."
A few days later, they all felt themselves getting hotter and hotter, and they knew that it was going to be their time to go. They were released abruptly and sure enough, there was Stanley swimming far ahead of all the others…
All of a sudden, Stanley stopped, turned around, and began to swim back with all his might….
"GO BACK! GO BACK!’ he screamed….. IT’S A BLOW JOB!!!