(the way I heard it…)

At the beginning of World War II, the English were helping the Resistance in one of the Scandinavian countries. There was a problem, however. Their guns – excuse me, their rifles – kept freezing in the winter cold.

They found that a condom rolled down over the muzzle helped, and the English requested supplies of extra-long (two feet? whatever…) from an English manufacturer. Winston Churchill himself okayed the order, but had the maker print British Made – Size Small on the special rubbers.

As the Germans advanced, the English retreated – but left the condoms behind for the Nazis benefit.