[Illustration: THE STUDY OF INFANT HEALTH IS CONDUCIVE TO PURE-MINDEDNESS Note the simple, comfortable, hygienic dress] Once having made up our minds to concentrate the teaching of sex hygiene upon sex health rather than upon sex immorality, upon sex functions rather than upon sex diseases, the chief objection to school instruction and to instruction in class will disappear. Our school text-books in history, literature, and biology abound in references to sex distinctions, sex functions, and sex health. In enumerating the daily routine of health habits I mentioned daily bathing of the armpits and crotch. There is nothing in this injunction to offend or injure a boy or girl. If studies and physical training are to be adapted to physiological age, and if children are to know why they are graded according to physiological age as well as mental brightness, we shall soon be talking of mature, maturing and not-yet-maturing girls and boys, so that everybody will be instructed in sex hygiene without offense. Any teacher who can explain the family troubles of King Henry VIII without becoming self-conscious can easily learn to look a class of girls and boys in the face and explain how a mother's health will injure her baby before its birth, why breast-fed babies are more apt to live than bottle-fed babies, why it is as important for the mother to keep a nursing breast absolutely clean as to clean the nipple of a nursing bottle. Words whispered by children, or marked in dictionaries, to be stealthily and repeatedly looked upon and talked over with other children, lose all their glamour when pronounced by a teacher. In these days of state subsidy of school libraries the child is hard to find who has not free access to books of fiction full of voluptuous allusions that make undesirable impressions which only blunt, candid discussion of sex facts can make harmless. Children now learn, whether in fashionable private schools or crowded slums, practically all that is lascivious and unwholesome about sex. For teachers to explain that which is wholesome and pure will disinfect the minds of most children and protect them against miseducation. Class instruction in hygiene is practicable for all matters pertaining to normal sex health. Girls of thirteen should be taught in classes the fact and meaning of menstruation, and its grave importance to the health, in order that they may care for themselves not only before, during, and immediately after the menstrual period, but throughout the month, in order that menstruation itself shall not be unnecessarily painful, enervating, and harmful to efficiency. It is not yet advisable to discuss dangers peculiar to girls or dangers peculiar to boys in mixed classes. Generally speaking, it is undesirable that men teachers discuss girls' troubles with girl pupils. But why should it not become possible for women teachers to explain health dangers peculiar to girls to classes of boys?