YOUTH AND SEX Dangers and Safeguards for Girls and Boys by MARY SCHARLIEB, M.D., M.S., AND F. ARTHUR SIBLY, M.A., LL.D. 1919 CONTENTS. PART I.: GIRLS. BY MARY SCHARLIEB, M.D., M.S. INTRODUCTION I. CHANGES OBSERVABLE DURING PUBERTY AND ADOLESCENCE IN GIRLS II. OUR DUTIES TOWARDS ADOLESCENT GIRLS III. CARE OF THE ADOLESCENT GIRL IN SICKNESS IV. MENTAL AND MORAL TRAINING V. THE FINAL AIM OF EDUCATION PART II.: BOYS. BY F. ARTHUR SIBLY, M.A., LL.D. PREFACE TO THE SECOND EDITION INTRODUCTORY NOTE I. PREVALENCE OF IMPURITY AMONG BOYS: THE AUTHOR'S OWN EXPERIENCE II. PREVALENCE OF IMPURITY AMONG BOYS: THE OPINIONS OF CANON LYTTELTON, DR. DUKES AND OTHERS III. CAUSES OF THE PREVALENCE OF IMPURITY AMONG BOYS IV. RESULTS OF YOUTHFUL IMPURITY V. SEX KNOWLEDGE IS COMPATIBLE WITH PERFECT REFINEMENT AND INNOCENCE VI. CONDITIONS UNDER WHICH PURITY TEACHING IS BEST GIVEN: REMEDIAL AND CURATIVE MEASURES NOTE TO CORRESPONDENTS PART I.: GIRLS. BY MARY SCHARLIEB, M.D., M.S. INTRODUCTION. Probably the most important years in anyone's life are those eight or ten preceding the twenty-first birthday. During these years _Heredity_, one of the two great developmental factors, bears its crop, and the seeds sown before birth and during childhood come to maturity. During these years also the other great developmental force known as _Environment_ has full play, the still plastic nature is moulded by circumstances, and the influence of these two forces is seen in the manner of individual that results. This time is generally alluded to under two heads: (1) Puberty, (2) Adolescence. By Puberty we understand the period when the reproductive organs are developed, the boy or girl ceasing to be the neutral child and acquiring the distinctive characteristics of man or woman. The actual season of puberty varies in different individuals from the eleventh to the sixteenth year, and although the changes during this time are not sudden, they are comparatively rapid. By Adolescence we understand the time during which the individual is approximating to the adult type, puberty having been already accomplished. Adolescence corresponds to the latter half of the developmental period, and may be prolonged even up to twenty-five years. CHAPTER I. CHANGES OBSERVABLE DURING PUBERTY AND ADOLESCENCE IN GIRLS.