Eggs and Ham
Although he always ordered just ham and eggs everyday, one customer at the diner always studied the menu carefully each day before ordering. One day, his regular waitress decided to see if he could be made to order anything else. Before giving him the menu she marked out the ham and eggs entry.
Once the customer had looked over the menu for a few minutes, the waitress approached him and asked,
"Sir, did you notice that I scratched something you like?"
Without looking up from the menu, he quickly replied, "Well, then go wash your hands and bring me some ham and eggs."