The gynecologist Kisch states his belief that "The sexual impulse is so powerful in women that at certain periods of life its primitive force dominates her whole nature, and there can be no room left for reason to argue concerning reproduction; on the contrary, union is desired even in the presence of the fear of reproduction or when there can be no question of it." He regards absence of sexual feeling in women as pathological. (Kisch, _Sterilität des Weibes_, second edition, pp. 205-206.) In his later work (_The Sexual Life of Woman_) Kisch again asserts that sexual impulse always exists in mature women (in the absence of organic sexual defect and cerebral disease), though it varies in strength and may be repressed. In adolescent girls, however, it is weaker than in youths of the same age. After she has had sexual experiences, Kisch maintains, a woman's sexual emotions are just as powerful as a man's, though she has more motives than a man for controlling them. Eulenburg is of the same opinion as Kisch, and sharply criticises the loose assertion of some authorities who have expressed themselves in an opposite sense. (A. Eulenburg, _Sexuale Neuropathie_, pp. 88-90; the same author has dealt with the point in the _Zukunft_, December 2, 1893.) Kossmann states that the opinion as to the widespread existence of frigidity among women is a fable. (Kossmann, _Allgemeine Gynæcologie_, 1903, p. 362.) Bloch concludes that "in most cases the sexual coldness of women is in fact only apparent, either due to the concealment of glowing sexuality beneath the veil of outward reticence prescribed by conventional morality, or else to the husband who has not succeeded in arousing erotic sensations which are complicated and with difficulty awakened.... The sexual sensibility of women is certainly different from that of men, but in strength it is at least as great." (Iwan Bloch, _Das Sexualleben unserer Zeit_ 1907, ch. v.) Nyström, also, after devoting a chapter to the discussion of the causes of sexual coldness in women, concludes: "My conviction, founded on experience, is, that only a small number of women would be without sexual feeling if sound views and teaching prevailed in respect to the sexual life, if due weight were given to inner devotion and tender caresses as the preliminaries of love in marriage, and if couples who wish to avoid pregnancy would adopt sensible preventive methods instead of _coitus interruptus_." (A. Nyström, _Das Geschlichtsleben und seine Gesetze_, eighth edition, 1907, p. 177.)