ago openly that he faced my sexual theories incredulous and bewildered, and since that time by his own observations had substantiated them in their whole scope.[1] If it is true that most men, medical observers and others, do not want to know anything about the sexual life of the child, the fact is capable of explanation only too easily. They have forgotten their own infantile sexual activity under the pressure of education for civilization and do not care to be reminded now of the repressed material. You will be convinced otherwise if you begin the investigation by a self-analysis, by an interpretation of your own childhood memories.
Lay aside your doubts and let us evaluate the infantile sexuality of the earliest years.[2] The sexual impulse of the child manifests itself as a very complex one, it permits of an analysis into many components, which spring from different sources. It is entirely disconnected from the function of reproduction which it is later to serve. It permits the child to gain different sorts of pleasure sensations, which we include, by the analogues and connections which they show, under the term sexual pleasures. The great source of infantile sexual pleasure is the auto-excitation of certain particularly sensitive parts of the body; besides the genitals are included the rectum and the opening of the urinary canal, and also the skin and other sensory surfaces. Since in this first phase of child sexual life the satisfaction is found on the child's own body and has nothing to do with any other object, we call this phase after a word coined by Havelock Ellis, that of "auto-erotism." The parts of the body significant in giving sexual pleasure we call 1 'erogenous zones." The thumb-sucking (Ludeln) or passionate sucking (Wonnesaugen) of very young children is a good example of such an auto-erotic satisfaction of an erogenous zone. The first scientific observer of this phenomenon, a specialist in children's diseases in Budapest by the name of Lindner, interpreted these rightly as sexual satisfaction and described exhaustively their transformation into other and higher forms of sexual gratification.[3] Another sexual satisfaction of this time of life is the excitation of the genitals by masturbation, which has such a great significance for later life and, in the case of many individuals, is never fully overcome. Besides this and other auto-erotic manifestations we see very early in the child the impulse-components of sexual pleasure, or, as we may say, of the libido, which presupposes a second person as its object. These impulses appear in opposed pairs,
