Intercourse like masturbation

Rudolph von Urban: The local relaxation of the sex organs through orgasm would diminish the body's tension less effectively than the expulsion of the bio-electricity from the whole body. That is the reason why the local irritation produced by masturbation brings depression and still greater tension in the wake of a few seconds of local satisfaction, the friction itself having served to produce a further charge of radiations, thus tensing the body's cells. Reasoning along these lines, it becomes clear that sexual intercourse, inadequately prepared for and of too brief duration, is nothing other than a form of masturbation, since it fails to take into account the necessary delivery of the whole body from its "overcharge."" Sex Perfection and Marital Happiness, page 109, published in 1949.