Brett Kahr is Senior Clinical Research Fellow in Psychotherapy and Mental Health at the Centre for Child Mental Health in London, and the Winnicott Clinic Senior Research Fellow at the Winnicott Clinic of Psychotherapy. Having worked for many years as a Registered Psychotherapist and as a Registered Couple Psychoanalytic Psychotherapist, he recognised the need for a full-scale research study on the origins and functions of sexual fantasy. The results of his five-year research project form the basis of this book. Additionally, he is Visiting Clinician and Lecturer at the Tavistock Centre for Couple Relationships at the Tavistock Institute of Medical Psychology, and the Chair of the Society of Couple Psychoanalytic Psychotherapists. He maintains a private practice for individuals and couples in North London.