For many people, a loving, committed relationship is indeed a great enhancer of sexual desire, a fillip. They feel accepted and swaddled, and that safety allows them to feel free. The trust that comes with emotional closeness enables them to unleash their erotic appetites. But what about John and Beatrice? They don’t fill the bill. They have a beautiful, intimate, loving relationship (they communicate); and, according to this view, that should form the basis for sustained desire. But it doesn’t. And if it’s any consolation to them, it doesn’t work this way for a lot of people.