Two German spies are coming to the English pub during WWII. Before entering the pub, one of them says to another: "Remember, we are not Germans, so no schnapps this time, let's order the martini". "OK", - agrees another. So, they are coming to the pub and one of them says to a barman: - Martini, please. - Dry martini? - asks the barman. - Warum drei? Zwei!