Masks have been used for centuries to add an air of mystery and allure and it often extends into the bedroom. Of course there are the black leather bondage masks that cover most of the face, but there are also some more artsy, less threatening ones. Games don't feature as many masks as you might expect, although fighting games often feature them. Oh, and Pokemon wear masks to look like other Pokemon in contests, but if you find that instigating a stirring feeling in your trousers, close the DS, put it down and take a long, hard look at your life.
Above: The real mask is from extremerestraints.com (yeah, our research took us to some strange places, believe us). The others are Vega from Street Fighter II, El Blaze from Virtua Fighter 5 and Rumble Roses' Evil Rose.