Deeper psychological discussions justify the assertion that the person who becomes homosexual in this manner remains fixed in his unconscious on the memory picture or his mother, By repressing the love for his mother he conserves the same in his unconscious and henceforth remains faithful to her. When as a lover he seems to pursue boys, he really thus runs away from women who could cause him to become faithless to his mother. Through direct observation of individual cases we could demonstrate that he who is seemingly receptive only of masculine stimuli is in reality influenced by the charms emanating from women just like a normal person, but each and every time he hastens to transfer the stimulus he received from the woman to a male object and in this manner he repeats again and again the mechanism through which he acquired his homosexuality. It is far from us to exaggerate the importance of these explanations concerning the psychic genesis of homosexuality. It is quite clear that they are in crass opposition to the official theories of the homosexual spokesmen, but we are aware that these explanations are not sufficiently comprehensive to render possible a final explanation of the problem. What one calls homosexual for practical purposes may have its origin in a variety of psychosexual inhibiting processes, and the process recognized by us is perhaps only one among many, and has reference only to one type of "homosexuality." We must also admit, that the number of cases in our homosexual type which shows the conditions required by us, exceeds by far those cases in which the resulting effect really appears, so that even we cannot reject the supposed coöperation of unknown constitutional factors from which one was otherwise wont to deduce the whole of homosexuality. As a matter of fact there would be no occasion for entering into the psychic genesis of the form of homosexuality studied by us if there were not a strong presumption that Leonardo, from whose vulture-phantasy we started, really belonged to this one type of homosexuality. As little as is known concerning the sexual behavior of the great artist and investigator, we must still trust to the probability that the testimonies of his contemporaries did not go far astray. In the light of this tradition he appears to us as a man whose sexual need and activity were extraordinarily low, as if a higher striving had raised him above the common animal need of mankind. It may be open to doubt whether he ever sought direct sexual gratification, and in what manner, or whether he could dispense with it altogether. We are justified, however, to look also in him for those emotional streams which imperatively force others to the sexual act, for we cannot imagine a human psychic life in whose development the sexual desire in the broadest sense, the libido, has not had its share, whether the latter has withdrawn itself far from the original aim or whether it was detained from being put into execution.