Nicole Kidman and Tom Cruise in Eyes Wide Shut
In 1999, Stanley Kubrick released his last film, Eyes Wide Shut, which starred Kidman and Cruise, 'a Hollywood couple whose marriage was in trouble, about a New York couple whose marriage was in trouble.' It was famous for an orgy scene, but in the subtext of the film, it's really about a couple whose eyes are shut to their own sexuality/the sexual reality within their relationship (or the husband is having some kind of bad dream to that effect). It seems a little cruel, that under the circumstances (of their relationship about to break up), the lead actors were laid literally so bare.
A mismatch of libidos will often only rear its head as an issue after the honeymoon phase of a relationship is over.