"Hey, Joe," said Sam, "you got your mast right! The mizzenmast is the third one, at the back of the ship. The foremast is the front one. 'Fore' means 'front.' The mainmast is the tallest one in the middle. It's the 'main' one."
Fred and I stared at him.
"What?" said Sam defensively. "I just didn't want to miss a teaching moment."
"Whatever you say, Brain Boy," said Fred, standing up. "Let's go. "