[425] Von Schrenk-Notzing, op. cit., p. 9.
[426] Cf. A. Weill, “The Laws and Mysteries of Love,” p. 101 (Berlin, 1895).
[427] Havelock Ellis, op. cit., p. 266.
[428] G. M. Beard, “Sexual Neurasthenia,” second edition (Leipzig and Vienna, 1890).
[429] A. Eulenburg, “Sexual Neurasthenia,” published in Deutsche Klinik, 1902, vol. vi., pp. 163-206.
[430] L. Löwenfeld, op. cit., pp. 273, 274.
[431] Edmond and Jules de Goncourt, “Leaves from a Diary.”
[432] “During my life I have had under observation many a lecherous man and many a wanton woman, and I have always found that, without exception, voluptuous persons clothe themselves very warmly, and sleep under very warm bed-clothes. In earlier years I have reported several cases observed by me of warm clothing of the genital organs on the part of women who distinguished themselves by lasciviousness, and I could increase the number of examples of this kind by several dozen” (E. Reich, “Immorality and Intemperance,” pp. 43, 44).
[433] O. Effertz, “Neurasthenia Sexualis,” p. 46 (New York, 1894).
[434] Effertz estimates the frequency of frigidity in women at about 10 per cent. The truth probably lies midway between the views of Effertz and those of Guttzeit.