"In the normal woman, especially of the higher social classes," states Windscheid, "the sexual instinct is acquired, not inborn; when it is inborn, or awakes by itself, there is abnormality. Since women do not know this instinct before marriage, they do not miss it when they have no occasion in life to learn it." (F. Windscheid, "Die Beziehungen zwischen Gynäkologie und Neurologie," _Zentralblatt für Gynäkologie_, 1896, No. 22; quoted by. Moll, _Libido Sexualis_, Bd. i, p. 271.) "The sensuality of men," Moll states, "is in my opinion very much greater than that of women." (A. Moll, _Die Konträre Sexualempfindung_, third edition, 1899, p. 592.) "Women are, in general, less sensual than men," remarks Näcke, "notwithstanding the alleged greater nervous supply of their sexual organs." (P. Näcke, "Kritisches zum Kapitel der Sexualität," _Archiv für Psychiatrie_, 1899, p. 341.) Löwenfeld states that in normal young girls the specifically sexual feelings are absolutely unknown; so that desire cannot exist in them. Putting aside the not inconsiderable proportion of women in whom this absence of desire may persist and be permanent, even after sexual relationships have begun, thus constituting absolute frigidity, in a still larger number desire remains extremely moderate, constituting a state of relative frigidity. He adds that he cannot unconditionally support the view of Fürbringer, who is inclined to ascribe sexual coldness to the majority of German married women. (L. Löwenfeld, _Sexualleben und Nervenleiden_, 1899, second edition, p. 11.) Adler, who discusses the question at some length, decides that the sexual needs of women are less than those of men, though in some cases the orgasm in quantity and quality greatly exceeds that of men. He believes, not only that the sexual impulse in women is absolutely less than in men, and requires stronger stimulation to arouse it, but that also it suffers from a latency due to inhibition, which acts like a foreign body in the brain (analogous to the psychic trauma of Breuer and Freud in hysteria), and demands great skill in the man who is to awaken the woman to love. (O. Adler, _Die Mangelhafte Geschlechtsempfindung des Weibes_, 1904, pp. 47, 126 et seq.; also enlarged second edition, 1911; id., "Die Frigide Frau," _Sexual-Probleme_, Jan., 1912.) It must not, however, be supposed that this view of the natural tendency of women to frigidity has everywhere found acceptance. It is not only an opinion of very recent growth, but is confined, on the whole, to a few countries.