These pages present the authors' response to G. L. Kelley's Sex Manual1 and a dialectic discussion of the conclusions of their previous work on female sexuality. Frigidity in women still consists of the absence of vaginal orgasm and this definition should be adhered to, regardless of the degree of clitoral orgastic potency present. Some widespread misunderstandings about the technique of intercourse and their consequences are debated and others still to come (Kinsey) are anticipated.