Permit me, therefore, to continue with my brief presentation of infantile sexuality. What I have told you about two organic systems I could supplement by a discussion of all the others. The sexual life of the child exhausts itself in the exercise of a series of partial instincts which seek, independently of one another, to gain satisfaction from his own body or from an external object. Among these organs the genitals speedily predominate. There are persons who continue the pursuit of satisfaction by means of their own genitals, without the aid of another genital or object, uninterruptedly from the onanism of the suckling to the onanism of necessity which arises in puberty, and even indefinitely beyond that. The theme of onanism alone would occupy us for a long period of time; it offers material for diverse observations. In spite of my inclination to shorten the theme, I must tell you something about the sexual curiosity of children. It is most characteristic for child sexuality and significant for the study of neurotic symptoms. The sexual curiosity of children begins very early, sometimes before the third year. It is not connected with the differences of sexes, which means nothing to the child, since the boy, at any rate, ascribes the same male genital to both sexes. When the boy first discovers the primary sexual structure of the female, he tries at first to deny the evidence of his senses, for he cannot conceive a human being who lacks the part of his body that is of such importance to him. Later he is terrified at the possibility revealed to him and he feels the influence of all the former threats, occasioned by his intensive preoccupation with his little organ. He becomes subject to the domination of the castration complex, the formation of which plays an important part in the development of his character, provided he remains healthy; of his neurosis, if he becomes diseased; of his resistance, if he is treated analytically. We know that the little girl feels injured on account of her lack of a large, visible penis, envies the boy his possession, and primarily from this motive desires to be a man. This wish manifests itself subsequently in neurosis, arising from some failure in her role as a woman. During childhood, the clitoris of the girl is the equivalent of the penis; it is especially excitable, the zone where auto-erotic satisfaction is achieved. In the transition to womanhood it is most important that the sensations of the clitoris are completely transferred at the right time to the entrance of the vagina. In cases of so-called sexual anesthesia of women the clitoris has obstinately retained its excitability.