Two storks on a nest, a father stork and baby stork. Baby is crying and
crying and father stork is trying to calm him. "Don't worry Son, your
mother will come back. She's only bringing people babies and making them happy." 
The next night, its fathers turn to do the job.
"Son, your father will be back as soon as possible, but now he's bringing
joy to new mommies and daddies." 
A few days later, the stork parents are desperate, their son is gone from
the nest all night. Finally, shortly before dawn, he returns and the
parents ask their son where he had been all night. 
Says the baby stork, "Awww, just scaring the shit out of college kids!"