Once upon a time, many media years BKE (before the Kardashian Era) sexy was defined by absence. It was what you didn't see when you caught the glimpse of skin between the slits of the skirt that made it sexy. The lives of celebrities were sexy because you saw only a "sneak peek" of the good stuff and got to imagine the rest. Fictional dramas imagined how the one percent lived and it was the guessing -- along with the scheming -- that kept us hooked. The humble email, the earliest ripple of the social media tsunami, was sexy because it may or may not have been there.