A ground-breaking psychoanalytic study on sexuality which maintains its originality today, forty-five years after its first publication. The book is a revision of psychoanalytic theory, starting with the work of Freud himself and including Melanie Klein's contributions on the early Oedipus Complex and the Depressive Position. But more than that, it is a metapsychological study of sexuality which provides a different perspective from more well-known ones that relate simply to a descriptive or behavioural point of view. In differentiating adult sexuality from infantile sexuality and polymorphism and perversion, taking unconscious phantasy and the notion of the primal scene as the pivotal point, Meltzer proposes a unified theoretical and clinical model which has proved of particular help in the field of the psychopathology of addictions and perversions.