How natural the sexual impulse is in women, whatever difficulties may arise in regard to its complete gratification, is clearly seen when we come to consider the frequency with which in young women we witness its more or less instinctive manifestations. Such manifestations are liable to occur in a specially marked manner in the years immediately following the establishment of puberty, and are the more impressive when we remember the comparatively passive part played by the female generally in the game of courtship, and the immense social force working on women to compel them to even an unnatural extension of that passive part. The manifestations to which I allude not only occur with most frequency in young girls, but, contrary to the common belief, they seem to occur chiefly in innocent and unperverted girls. The more vicious are skillful enough to avoid the necessity for any such open manifestations. We have to bear this in mind when confronted by flagrant sexual phenomena in young girls. "A young girl," says Hammer ("Ueber die Sinnlichkeit gesunder Jungfrauen," _Die Neue Generation_, Aug., 1911), "who has not previously adopted any method of self-gratification experiences at the beginning of puberty, about the time of the first menstruation and the sprouting of the pubic hair, in the absence of all stimulation by a man, spontaneous sexual tendencies of both local and psychic nature. On the psychic side there is a feeling of emptiness and dissatisfaction, a need of subjection and of serving, and, if the opportunity has so far been absent, the craving to see masculine nudity and to learn the facts of procreation. Side by side with these wishes, there are at the same time inhibitory desires, such as the wish to keep herself pure, either for a man whom she represents to herself as the 'ideal,' or for her parents, who must not be worried, or as a member of a chosen people in whose spirit she must live and die, or out of love to Jesus or to some saint. On the physical side, there is the feeling of fresh power and energy, of enterprise; the agreeable tension of the genital regions, which easily become moist. Then there is the feeling of overirritability and excess of tension, and the need of relieving the tension through pinches, blows, tight lacing, and so forth. If the girl remains innocent of sex satisfaction, there takes place during sleep, at regular intervals of about three days, more or less the relief and emission of the tense glands, not corresponding to the menstrual period, but to intercourse, and serving better than sexual instruction to represent to her the phenomena of intercourse. If at this period actual intercourse takes place, it is, as a rule, free from pain, as also is the introduction of the speculum. Without any seduction from without, the chaste girl now