Ordering Coffee

John and Jake went into a diner that looked as though it had seen
better days. As they slid in to a booth, John wiped some crumbs from
the seat. Then he took a napkin and wiped some mustard from the table.
The waitress, in a dirty uniform, came over and asked if they wanted
some menus.

"No thanks," said John, "I'll just have a cup of black coffee."

"I'll have black coffee, too," Jake said. "And please make sure the
cup is clean."

The waitress shot him a nasty look. She turned and marched off in to
the kitchen. Two minutes later, she was back.

"Two cups of black coffee," she announced. "Which one of you wanted
the clean cup?"