Under-Where?

Wearing boxers is an odd show of modesty.  As America moved from the 80's to the 90's to the 00's, there was a cultural movement to prefer boxers over briefs.  This change must have coincided with the simultanious decrease in modesty that allowed men to be seen more often without pants.  The less pants are worn, the greater the urgency there must be to cover one's private parts.  This results in the increasing amount of boxers worn.

This may even be a direct result of the VHS to digital movement, as there is a greater fear that people's lives can be recorded, there is a simultaneous urge to look good with your clothes off, but not be so immodest that you can see your package.  It's a scary thing to be caught with your pants down, but it can change your life for the worse if you are wearing tighty-whiteys.