HKB
by the latency period; it is characterized by the infantile nature of its sexual aims. The second shift starts with puberty and determines the definitive formation of the sexual life.
The fact of the double object selection which is essentially due to the effect of the latency period, becomes most significant for the disturbance of this terminal state. The results of the infantile object selection reach into the later period; they are either preserved as such or are even refreshed at the time of puberty. But due to the development of the repression which takes place between the two phases they turn out as unutilizable. The sexual aims have become softened and now represent what we can designate as the tender streams of the sexual life. Only psychoanalytic investigation can demonstrate that behind this tenderness, such as honoring and esteeming, there is concealed the old sexual strivings of the infantile partial impulses which have now become useless. The object selection of the pubescent period must renounce the infantile objects and begin anew as a sensuous stream. The fact that the two streams do not meet often enough has as a result that one of the ideals of the sexual life, namely, the union of all desires in one object, can not be attained.
THE SOURCES OF THE INFANTILE SEXUALITY
In our effort to follow up the origins of the sexual impulse, we have thus far found that the sexual excitement originates (a) as an imitation of a gratification which has been experienced in conjunction with other organic processes; (b) through the appropriate peripheral stimulation of erogenous zones; (c) and as an expression of some "impulse," like the looking and cruelty impulses, the origin of which we do not yet fully understand. The psychoanalytic investigation of later life which leads back to childhood and the contemporary observation of the child itself cooeperate to reveal to us still other regularly-flowing sources of the sexual excitement. The observation of childhood has the disadvantage of treating easily misunderstood material, while psychoanalysis is made difficult by the fact that it can reach its objects and conclusions only by great detours; still the united efforts of both methods achieve a sufficient degree of positive understanding.
In investigating the erogenous zones we have already found that these skin regions merely show the special exaggeration of a form of sensitiveness which is to a certain degree found over the whole surface of the skin. It will therefore not surprise us to learn that certain forms of general sensitiveness in the skin can be ascribed to very distinct erogenous action. Among these we will above all mention the temperature sensitiveness; this will perhaps prepare us for the understanding of the therapeutic effects of warm baths.