One thing more. You have on the whole gained very little for what you are so eager to maintain, the sexual ‘purity’ of children, even if you can convince me that the infant’s activities had better not be regarded as sexual. For from the third year onwards there is no longer any doubt about sexual life in the child; at this period the genital organs begin already to show signs of excitation; there is a perhaps regular period of infantile masturbation, that is, of gratification in the genital organs. The mental and social sides of sexual life need no longer be overlooked: choice of object, distinguishing of particular persons with affection, even decision in favour of one sex or the other, and jealousy, were conclusively established independently by impartial observation before the time of psycho-analysis; they may be confirmed by any observer who will use his eyes. You will object that you never doubted the early awakening of affection but only that this affection was of a ‘sexual’ quality. Children between the ages of three and eight have certainly learnt to conceal this element in it; but nevertheless if you look attentively you will collect enough evidence of the ‘sensual’ nature of this affection, and whatever still escapes your notice will be amply and readily supplied by analytic investigation. The sexual aims in this period of life are in closest connection with the sexual curiosity arising at the same time, of which I have given you some description. The perverse character of some of these aims is a natural result of the immature constitution of the child who has not yet discovered the aim of the act of intercourse. From about the sixth or eighth year onwards a standstill or retrogression is observed in the sexual development, which in those cases reaching a high cultural standard deserves to be called a _latency period_. This latency period, however, may be absent; nor does it necessarily entail an interruption of sexual activities and sexual interests over the whole field. Most of the mental experiences and excitations occurring before the latency period then succumb to the infantile amnesia, already discussed, which veils our earliest childhood from us and estranges us from it. It is the task of every psycho-analysis to bring this forgotten period of life back into recollection; one cannot resist the supposition that the beginnings of sexual life belonging to this period are the motive for this forgetting, that is, that this oblivion is an effect of repression.