go back~~~~~~``

Once upon a time there was a sperm named Harry, a
very healthy sperm. He'd do push-ups and
somersaults and limber himself up all the time.
One day, one of them became curious enough to ask
Harry why he exercised all day.
Harry said, "Look, pal only one sperm gets a woman
pregnant and when the right time comes, I am going
to be the one.
A few days later, they all felt themselves getting
hotter and hotter, and they knew that it was
getting to be their time to go. They were released
abruptly and, sure enough, there
was Harry swimming far ahead of all the others.
All of a sudden, stopped, turned around, and began
to swim back with all his might.
"Go back! Go back!" he screamed.
"It's a blow job!"