of orgasm and what it means physically and psychologically. The importance of such understanding is due, of course, to the fact that orgasm, of the type described here, is the very thing the frigid woman is unable to have. In fact, its absence from her experience is the usual definition of frigidity. Certain kinds of frigid women may experience one, two, or all of the physical and psychological reactions described above, which normally would terminate with orgasm. But the final experience eludes them; at the vital juncture the body, despite an agonizing need to come to a climax, refuses to respond; it draws back, goes dead.
Orgasm is the physiological response which brings sexual intercourse to its natural and beautiful termination. It is preceded by a very dramatic increase in all of the phenomena noted above. In the moment just preceding orgasm, muscular tension suddenly rises to the point where, if the sexual instinct were not in operation, it would become physically unendurable. The pelvic motions of the man and the movement of the penis back and forth within the vagina increase in speed and in intensity of thrust. The woman's pelvic movements also increase, and her whole body attempts with every move to heighten the exquisite sensations she is experiencing within her vagina. According to many women with whom I have discussed this experience, the greatest pleasure is caused by the sensation of fullness within the vagina and the pressure and friction upon its posterior surface.
At the moment of greatest muscular tension all sensations seem to take one further rise upward. The woman tenses beyond the point where, it seems, it would be possible to maintain such tension for a moment longer. And indeed it is not possible, and now her whole body suddenly plunges into a series of muscular spasms. These spasms take place within the vagina itself, shaking the body with waves of pleasure. They are felt simultaneously throughout the body:
