When is it timely to publish a synthesis of previously published and original materials from a specific discipline? I believe it to be timely when one has a sufficient amount of high-quality material covering the critical areas of that topic, when the previously published material is scattered over a wide range of journals and books, and when there is no single book that synthesizes the discipline. The treatment of sexual dysfunction emerged to the front lines of health delivery only during the past decade with the pioneering work of William Masters and Virginia Johnson. In spite of the rash of sex clinics and sex therapists that followed, preciously little solid research has been conducted on the various strategies of therapy, the means of assessing complex interpersonal sexual relation­ ships, and the manner by which clinical change is objectively assessed. No one reader can keep pace with the multitude of jounials that publish key material by sophisticated investigators. And no one investigator can cover these salient areas alone with his or her original work in a single volume. The critical papers have now been written. Ten were written specifically for this volume and thirty-three have previously appeared. This volume laces them together into a coherent pattern. Thus, the time for a synthesis in sexual dysfunction.