Janke brings together opinions to this effect, Die Willkürliche Hervorbringen des Geschlechts, p. 275. "If we compare a prostitute of thirty-five with her respectable sister," Acton remarked (Prostitution, 1870, p. 39), "we seldom find that the constitutional ravages often thought to be necessary consequences of prostitution exceed those attributable to the cares of a family and the heart-wearing struggles of virtuous labor."
Hirschfeld states (Wesen der Liebe, p. 35) that the desire for intercourse with a sympathetic person is heightened, and not decreased, by a professional act of coitus.
This has been clearly shown by Hans Ostwald (from whom I take the above-quoted observation of a prostitute), one of the best authorities on prostitute life and character; see, e.g., his article, "Die erotischen Beziehungen zwischen Dirne und Zuhälter," Sexual-Probleme, June, 1908. In the subsequent number of the same periodical (July, 1908, p. 393) Dr. Max Marcuse supports Ostwald's experiences, and says that the letters of prostitutes and their bullies are love-letters exactly like those of respectable people of the same class, and with the same elements of love and jealousy; these relationships, he remarks, often prove very enduring. The prostitute author of the Tagebuch einer Verlorenen (p. 147) also has some remarks on the prostitute's relations to her bully, stating that it is simply the natural relationship of a girl to her lover.
Thus Moraglia found that among 180 prostitutes in North Italian brothels, and among 23 elegant Italian and foreign cocottes, every one admitted that she masturbated, preferably by friction of the clitoris; 113 of them, the majority, declared that they preferred solitary or mutual masturbation to normal coitus. Hammer states (Zehn Lebensläufe Berliner Kontrollmädchen in Ostwald's series of "Grosstadt Dokumente," 1905) that when in hospital all but three or four of sixty prostitutes masturbate, and those who do not are laughed at by the rest.