Otherwise you wind up like me, steeped in the study of history that I am, walking from work to my apartment today, whistling a stirring anthem. I was like "Hey, this is catchy; I wonder what it is?" until I realized that it was the Horst Wessel Song.
Actually, it's probably more the Wolfenstein 3D and Indiana Jones movies that embedded it in my head, but still, you have to admit that it's stirring. Evil, but stirring.