Sec. 18. Who should give sex-instruction? Sec. 19. The child's first teachers of sex-knowledge. Sec. 20. Selecting teachers for class instruction. Sec. 21. Certain undesirable teachers for special hygienic and ethical instruction. V. BOOKS AS TEACHERS CONCERNING SEX AND LIFE 121 Sec. 22. Value and danger of special sex-books for young people. Sec. 23. General literature and sex problems. Sec. 24. Dangers in literature on sexual abnormality. VI. SEX-INSTRUCTION FOR PRE-ADOLESCENT YEARS 133 Sec. 25. Elementary instruction and influence. Sec. 26. Hygienic and educational treatment of unhealthful habits. VII. SEX-INSTRUCTION FOR EARLY ADOLESCENT YEARS 146 Sec. 27. The biological foundations. Sec. 28. Scientific facts for boys. Sec. 29. Scientific facts for girls. VIII. SPECIAL SEX-INSTRUCTION FOR ADOLESCENT BOYS AND YOUNG MEN 156 Sec. 30. Developing attitude towards womanhood. Sec. 31. Developing ideals of love and marriage. Sec. 32. Reasons for pre-marital continence. Sec. 33. Essential knowledge concerning prostitution. Sec. 34. Need of refinement of men. Sec. 35. Dancing as a sex problem for men. Sec. 36. Dress of women as a sex problem for men. Sec. 37. The problem of self-control for young men. Sec. 38. The mental side of a young man's sexual life. IX. SPECIAL INSTRUCTION FOR MATURING YOUNG WOMEN 184 Sec. 39. The young woman's attitude towards manhood. Sec. 40. The young woman's attitude towards love and marriage. Sec. 41. Reasons for pre-marital continence of young women. Sec. 42. Need of optimistic and aesthetic views of sex by women. Sec. 43. Other problems for young women. X. CRITICISMS OF SEX-EDUCATION 203 Sec. 44. A plea for reticence--Agnes Repplier. Sec. 45. A plea for religious approach--Cosmo Hamilton. Sec. 46. The conflict between sex-hygiene and sex-ethics--Richard Cabot Sec. 47. The arrogance of the advocates of sex-education--William H. Maxwell. Sec. 48. Lubricity in education--W.H. Taft. Sec. 49. Conclusions from the criticisms of sex-education. XI. THE PAST AND THE FUTURE OF THE SEX-EDUCATION MOVEMENT 227 Sec. 50. The American movement. Sec. 51. Important steps. Sec. 52. The future of the larger sex-education. XII. SOME BOOKS FOR SEX-EDUCATION 238 INDEX 249 I THE MEANING, NEED, AND SCOPE OF SEX-EDUCATION Sec. 1. _Sex-education and Its Relation to Sex-hygiene and Social Hygiene_ [Sidenote: Definition of sex-education.]