Milk Ship

A man was being a milker for the first time. He had skipped a cow when the other milker said, "Put the cups on her, stupid!"

He obliged, heavily in thought. After a while, he asked, why do you call them all 'she's? Is it prejudice or something? Or is it a ship thing?"

So the more experienced milker says, "I'll show you later."
After a while, he beckons the rookie over to one particular cow, who, for some reason, has no cups on- and no udder to speak of.

With a grin, he points to the animal's balls and says, "Try milking that, buddy."