The suppression of economic knowledge, disastrous as it is, is quite intelligible, its corrupt motive being as clear as the motive of a burglar for concealing his jemmy from a policeman. But the other great suppression in our schools, the suppression of the subject of sex, is a case of taboo. In mankind, the lower the type, and the less cultivated the mind, the less courage there is to face important subjects objectively. The ablest and most highly cultivated people continually discuss religion, politics, and sex: it is hardly an exaggeration to say that they discuss nothing else with fully-awakened interest. Commoner and less cultivated people, even when they form societies for discussion, make a rule that politics and religion are not to be mentioned, and take it for granted that no decent person would attempt to discuss sex. The three subjects are feared because they rouse the crude passions which call for furious gratification in murder and rapine at worst, and, at best, lead to quarrels and undesirable states of consciousness. Even when this excuse of bad manners, ill temper, and brutishness (for that is what it comes to) compels us to accept it from those adults among whom political and theological discussion does as a matter of fact lead to the drawing of knives and pistols, and sex discussion leads to obscenity, it has no application to children except as an imperative reason for training them to respect other people's opinions, and to insist on respect for their own in these as in other important matters which are equally dangerous: for example, money. And in any case there are decisive reasons; superior, like the reasons for suspending conventional reticences between doctor and patient, to all considerations of mere decorum, for giving proper instruction in the facts of sex. Those who object to it (not counting coarse people who thoughtlessly seize every opportunity of affecting and parading a fictitious delicacy) are, in effect, advocating ignorance as a safeguard against precocity. If ignorance were practicable there would be something to be said for it up to the age at which ignorance is a danger instead of a safeguard. Even as it is, it seems undesirable that any special emphasis should be given to the subject, whether by way of delicacy and poetry or too impressive warning. But the plain fact is that in refusing to allow the child to be taught by qualified unrelated elders (the parents shrink from the lesson, even when they are otherwise qualified, because their own relation to the child makes the subject impossible between them) we are virtually arranging to have our children taught by other children in guilty secrets and unclean jests. And that settles the question for all sensible people.