A Belgian came into a bar and ordered a beer. The waiter put a coaster and a beer on the table.
Ten minutes later the Belgian ordered another beer. The waiter brought him the beer and saw that the coaster had disappeared. So he fetched another one..
Ten minutes later, another beer. And again the coaster was missing. This time the waiter decided he would not lay down another coaster..
- "Hey" the Belgian said, "where's my cookie ?"