Stanley, the sperm, was always exercising. He wanted to be in top
physical condition.

One of the other sperm asks, Stanley, why do you always work-out
instead of lounging around like the rest of us?

Stanley replied, Well, there is only one sperm that impregnates a
woman. I am going to be that sperm.

A few days later, things started heating up and all the sperm were ready
to go. When the time was right, Stanley was out-distancing all the other
sperms by a great distance. Suddenly, Stanley started swimming back
toward the other sperm,
screaming wildly, Go back, go back its a blowjob!