People with healthy, fulfilling sex lives usually don't feel the need to talk about it all the time. They usually keep it between whoever they're involved with, or only bring it up if it's relevant. Kind of like how truly intelligent people never feel the need to draw attention to it, and just let it naturally show by itself. Hell, the same goes for niceness now that I think about it. Truly nice people also don't feel the need to broadcast it, and just let said niceness speak for itself.