[560] Arduin, “The Woman’s Question and Sexual Intermediate Stages” (op. cit., 1900, vol. ii., pp. 211-223).
[561] W. Hammer, “Tribadism in Berlin,” p. 97 (Berlin, 1906).
[562] Cf. “A Description of an Urnindes’ Ball,” given by M. Hirschfeld, “Berlin’s Third Sex,” pp. 56, 57.
[563] Cf. Martial d’Estoc, “Paris-Eros,” p. 59 et seq.
[564] Cf. F. Karsch, “Pæderasty and Tribadism among Animals as recorded in Literature,” published in the Annual for Sexual Intermediate Stages, 1900, vol. ii., pp. 126-160; P. Näcke, “Pæderasty in Animals,” published in the Archives of Criminal Anthropology, 1904, vol. xiv., pp. 361, 362.
[565] L. Krehl, “The Disturbance of Chemical Correlations in the Organism” (Leipzig, 1907). Here, on p. 3, we find: “If we are compelled to assume that many varieties of cells in their rudimentary condition already bear the imprint of a masculine or feminine nature, still this masculine or feminine nature doubtless only undergoes its real development under the enduring chemical influence of the ovaries and the testicles.”
[566] This latter view has been maintained especially by Max Katte, in his treatise “The Purpose of the Existence of Homosexuals” (Annual for Sexual Intermediate Stages, vol. iv., pp. 272-288), but he completely ignores the evolutionary points of view. In the same way, Hans Freimark neglects them (“The Meaning of Uranism,” p. 14; Leipzig, 1906); he regards homosexuality as a transition to a state in which “mankind will no longer need gross material contact for purposes of reproduction.”