These three words are spoken in hushed voices over playdates and at playgrounds. But while we may whisper them to our closest girlfriends, or joke about them after one too many beers with the guys, when it comes to talking with our partners about what's really going on (or not going on, as the case may be) in our child-proofed bedrooms, more and more of us find ourselves tongue-tied and tiptoeing. Are you part of the "sleepless, sexless" club?