In a Wicked Age is a rules light system designed to deliver episodic cotent. A player might wind up cycling through multiple characters in any given game. Character creation is super-quick, and the GM supposedly needs 0 prep time because of a system designed to generate stories.
As for sexy things happening, this may not be the game for you. While I do enjoy sexy things happening in the game, they are not the immediate focus of my games. I am much more interested in building a mythology around the PCs and all that entails.
Actually, I'd love to play instead of GM, but that's probably a pipe dream.