Shortly after world war II, a certain government had devised a method of population demoralization, under the guise of humanitarian aid, where in they would package condoms which were labeled "normal" but were in fact comically over sized.
Males of that population would try to use the condoms, and finding them to big to use, would eventually come to the conclusion that the men of that originating country are far anatomically superior if that is what is considered "normal". So when the time came for an eventual invasion, all of the soldiers of that country would be extremely intimidated.
It is unclear to me whether or not this operation was ever successfully carried out or still in use today.