But we must guard against assuming as true all the traumas which are reported to us. Some of the incidents are interpolated into the life history and only subsequently assume significance. But nothing is so dangerous in psychology as one-sidedness. The etiology of homosexuality is a particularly fruitful field in which to prove, here and there, the role of infantile traumatic experiences. _Krafft-Ebing_ holds that _Binet’s_ theory will not stand close critical analysis but expresses himself very unfavorably regarding the importance of psychologic relations as a whole. He states: “Psychic forces are not sufficient to explain so serious a degenerative process.” This depreciation of psychic influences was not very surprising at a time when the prevalent tendency was to explain nearly everything through heredity or taint. Before attempting to give an exposition of the psychologic theory of homosexuality I must discuss the relations between homosexuality and neurosis. All investigators, we have already seen, agree that a relationship exists between them. The question is: does the homosexual become neurotic because he fears coming into conflict with the penal laws, because he feels his unfortunate predisposition is something contrary to nature (to adopt his own expression),—briefly because he is homosexual, or is he homosexual because he is neurotic? Here we naturally encounter the need of defining the meaning of neurosis. What is neurosis and who is neurotic? I call neurotic the person who has not successfully overcome the asocial cravings which he perceives to be unethical. I call asocial cravings all instincts which society rejects as conflicting with its cultural demands. That in itself shows that the essence of neurosis must differ in different countries. In one instance we find repression of normal sexuality, because sexual activity itself is considered unmoral. (Example: the properly brought up girl in good society who must remain coy.) In another, we find a struggle with instincts which society decrees as morbid. (Example: the actress who maintains many friendships and must suppress her homosexual longings.) In the same way criminal tendencies may play a role in the development of a neurosis. The neurosis is the result of the struggle between instinct and inhibition. There are, therefore, two paths for the development of the neurosis: a strong instinctive craving which naturally endeavors to break through the inhibitions and powerful inhibitions which reduce to a minimum the voicing of sexual needs even under the impulsion of strong instincts.