Explore the 5 mechanics of connection—from intellectual to spiritual—and learn how to move beyond the "roommate phase" to reclaim a relationship of depth.

Intelligence solves a remarkable number of problems. Then it meets problems that do not respond to more analysis: you understand exactly why a pattern exists and keep repeating it anyway.

Early in a relationship, partners pay extraordinary attention to each other. Over time, familiarity, practical roles, resentment and divided attention change how they see each other, and desire often changes with it.

Sexual desire rarely remains constant across the life of a long-term relationship. It can change with age, health, medication, hormones, stress, parenthood, sleep, body image, conflict, familiarity, attraction, and the quality of the sexual relationship itself.