Although I have detailed a number of phenomena characteristic of the sexual life of the child, it must not be assumed that these phenomena are common to all cases, or that every individual symptom is invariably observed. As I have previously explained, numerous exceptions occur. In some instances, only one symptom is discernible; in others, another only. The commonest early manifestations of the sexual life in childhood are, as was said before, the psychosexual phenomena. _Frequently, the individual symptoms are so faintly marked that they can be detected only by a very thorough and careful examination._ I wish merely to insist upon the fact that during the years of childhood which are commonly regarded as asexual, manifestations of the sexual life can with care almost always be detected, although at times their detection is by no means easy. In conclusion, however, it is necessary to point out that there are a certain number of children in whom up to the fourteenth year of life, and even later, manifestations of the sexual life are hardly discernible; but we have to remember that the results of castration prove, as has been shown above, that even when, in early life, the occurrence of sexual processes cannot be demonstrated, such processes are nevertheless going on. We meet with individuals in whom, even during the first years of youth, the development of the sexual life is extremely backward. There are boys of fifteen or sixteen who from time to time have an involuntary seminal emission, but who exhibit no other indications whatever of an active sexual life--neither masturbation, nor any discernible psychosexual processes. Nevertheless, in most cases of this kind, more careful observation will bring to light much, besides the occurrence of the involuntary seminal emissions, which points to an awakening of sexuality. Still, in some individuals, it is remarkable how long entire sexual innocence may persist. This is doubtless due in such cases, not to any specially rigorous natural virtue, but simply to the fact that in these cases sexual development is much slower than the average. Those concerned are thus devoid of all understanding of the sexual, just in the same way as persons born blind lack all understanding of colour. In most of the cases in which such retardation occurs, the sexual life subsequently becomes entirely normal, showing that the only abnormality was the exceptional delay in the occurrence of the various processes. I have myself seen a number of cases in which the development of the sexual life was delayed to such an extent that ejaculation during coitus was not effected until towards the end of the third decade of life, although erections, and even occasional nocturnal emissions, had occurred long before. I believe that cases of this kind are to a small extent only, if at all, the result of educational influences, and they are in no way dependent upon the so-called sexual