According to the general opinion, the sexual impulse is not so strongly developed in women as it is in men. _Hegar_, _Litzmann_, _Lombroso_, _P. Müller_, and many others, assume that the sexual sensibility of women is less than that of men; _Fürbringer_ is inclined to attribute the characteristic of sexual frigidity to the great majority of German wives. I do not believe that this view, of the slight intensity of the sexual impulse in women in general, is well grounded, and can admit only this much, that in adolescent girls who are inexperienced in sexual matters, the sexual impulse is less powerful than in youths of the same age who have undergone sexual enlightenment. From the moment when the woman also has been fully enlightened as to sexual affairs, and has actually experienced sexual excitement, her impulse toward intimate physical contact and toward copulation is just as powerful as that of men. According, however, to the dominant artificial conditions, man assumes it as his right to give free rein to his sexual desires and to gratify them without regard to consequences, whereas woman, narrowly confined within the boundaries imposed by law and convention, cannot so readily yield to her inclination in the direction of physical love, and must forcibly control that inclination. Moreover, a powerful check on the free indulgence of the sexual impulse is imposed on woman by the consequences of such indulgence, consequences which exist for woman only. I may further indicate as differential characteristics, that in woman the sexual impulse is more accessible to voluntary control than it is in man, the ardor of female sexual passion is more readily diminished than that of the male; and again that in the female the gratification of the sexual impulse is less narrowly restricted than in the male. Excessive sexual gratification on the one hand and suppression of sexual desire on the other are, generally speaking, less harmful to the female organism than to the male. In these differentiæ is to be found, in my opinion, the influence which determines the type of sexuality in the respective sexes.