In so far as the enlightenment has to do with purely biological processes, and especially in so far as it relates to processes in the vegetable and lower animal world, it can be effected in the school, and in the first years of the second period of childhood; but of course the giving of such instruction at school does not prevent a father who goes out walking with his son, or a mother with her daughter, from seizing opportunities of giving information about the sexual processes of plant-life. At school, education regarding such biological processes will form a part of the lessons in botany and zoology; or will be imparted in the class on general biology, if such a class exists. Instruction in hygiene, such as is often advised, has little to do with the matters we are now considering; and at any rate could merely involve an elementary account of such processes. The school may even be the best place for sexual enlightenment regarding the sexual life of human beings, at least in the case of the older pupils. There is no adequate reason for objecting to boys about to leave school being warned by a schoolmaster or a physician about the dangers of venereal disease; and at the same time a plea may be put forward against the view that it is incumbent upon every young man to prove his strength by the maximum indulgence in sexual intercourse. But the matter is very different as regards the enlightenment concerning the subjective processes of the sexual life of those who are still quite young. It is impossible to approve of the suggestion that a girl of twelve or a boy of fourteen should receive instruction in school as to the dangers of masturbation. Enlightenment of this sort must be given in a purely individual manner, and for this reason the school is here out of the question. It may be objected to this that we now and again encounter a schoolmaster who is able to establish between himself and his pupils a relationship of complete personal confidence, and that such a man is just as well able as the father to instruct his boys about these matters; _mutatis mutandis_, the same considerations apply to the exceptional schoolmistress as compared with the mother. But although it must be admitted that such cases really exist, they are--and this is no fault of master or mistress--such rare exceptions, that it is out of the question to base upon their existence a general rule that enlightenment upon these particular points should be given in the school. Enlightenment regarding the earliest manifestations of the sexual life, whether about the feelings or about the peripheral processes, demands such a degree of individualisation, that a schoolmaster or a schoolmistress, who has to teach from thirty to fifty pupils at once, or even a larger number than this, is quite unable to undertake anything of the kind. Such enlightenment can be properly effected only by an individual confidant, and by one who makes the fullest possible