Before they slid into a booth, one guy brushed crumbs off the seat and the other took a napkin and swiped at a spill on the table. The waitress came over and asked if they wanted some menus.
“No thanks,” said the first guy. “I’ll just have a cup of black coffee.”
“I’ll have black coffee too,” said the second. “And please make sure the cup is clean.”
The waitress shot him a nasty look. She turned and marched off into the kitchen.
Two minutes later, she was back. “Two cups of black coffee,” she announced.
“Which one of you wanted the clean cup?”
Remember, you can’t have everything. Where would you keep it?