Considering that we live in a post Sex And The City world, where vibrator sales are the new Tupperware parties and women are more empowered than ever to pursue their own sexual pleasure, it's tempting to think that men and women have finally leveled the playing field when it comes to casual sex. Women are increasingly feeling just as free to go out and find themselves a no-strings attached hook-up (which isn't as easy as many men like to say it is...) and wondering when leaving her underwear ...