Food, sleep, clothing, bathing, fresh air,--all these are vital also; whatever turns the flow and thrill of life into wholesome channels, abolishes indolence, stagnation, morbidity, and fosters abundance of bodily life,--such is the regimen of sex health. No bodily regimen can be effective without mental control. Nowhere does mind affect body more immediately and powerfully than in the realm of sex. The educator has two great tasks in this respect: first to improve the general environment in which the young must live and develop. As things are, our streets, store-windows, books and magazines, and especially public amusements, such as theaters and dance halls, abound in sexual suggestion and stimulation.[34] These agencies stimulate an excessive stream of sexual desire, with all its physical accompaniments, in boys and men: the natural and inevitable result is an overwhelming impulse toward illicit satisfaction in self-abuse or sexual immorality. Society in self-defense and the interest of its youth must wage war upon this mercenary exploiting of the sex impulse. Licentious thinking is the great foe of continence; the saying of Jesus may be paraphrased thus with physiological correctness: "He that looketh upon a woman to lust after her hath already committed the sexual act in his _nervous system_." Hence, the second task in this connection is to arouse and arm the youth against the lusts of the mind, and lead him in a resolute fight for mastery over his own thoughts. "Do not harbor in your mind anything you would fear to have your enemies know, or blush to have your friends know," is a good motto for boys and youth. When we come to instruction in matters of reproduction and sex, the first principle is that it should be given in organic relation with the rest of life and thought. It arises naturally in two main connections: in response to the child's own questions and problems; and as part and parcel of biological science. The common questions of the little child, "Where does the baby come from?" or perhaps even earlier, "How does the hen make the eggs?"--an actual question of a four-year-old--are the signal and the open door for easy and natural enlightenment. Seize the opportunity: tell the truth, as simply and briefly as possible, and the beginning is made; watch for and utilize all such opportunities, as they come, and the main road of the task is marked out; shock is minimized, if not eliminated, mutual confidence is engendered, and a priceless reward may be won. But if at that first question we falter, quibble, blush, lie, jest, or repel, we have entered the wrong road which leads eternally astray. Let no question ever be either ignored or neglected, least of all repelled. It is the golden opportunity for parent, teacher, or friend. To guarantee against the child seeking promiscuous and irresponsible sources of information, let his questions ever find the warmest welcome and kindest response at the parent's knee.[35]