On a Roman warship, the galley boss looked over his slaves and shouted, “Today I have good news. All of you are getting extra food tonight. “
The slaves all looked at him in silence, except one decrepit old man in the back, who moaned, “Oh God, no, not again. “
A new slave next to him asked, “Why are you moaning?”
“This only happens when the Captain’s nephew wants to water ski. “
This joke is included in the Black Book of Jokes. You can order it from here.