I heard this story the other day. I don't vouch for it being factually accurate, but you can hear the "truth" in it.
The guy telling the story grew up "in the country." He & his brother took the bus into town when they were little. They ate lunch in a small, local, casual restaurant. He overheard the waitress telling the cook, "Oh, Those boys so cute. Dey mus' be from da country. After dey pau (finished) eat, they brought their dirty dishes back to the kitchen."