"You know," said the pale young man to his friend, "I just don't seem to have any energy – and it's frustrating because I'm trying to write a novel."
"Have you tried chocolate?" asked the friend. It gave Montezuma energy you never dreamed of."
"Montezuma was writing a novel?"
"No. The story goes that he had the biggest harem in the world."
The next time the young man saw his friend, he rushed over and shook his hand. "I can't tell you how much that chocolate did for me!" he said.
"Good, good," replied the friend. "It helped your writing?"
"Writing?" asked the man. "Are you kidding? Who's got the time to write?"