{ sex-hygiene (personal, | for sexual health { social) | { | { biology (including | for attitude { physiology) of | regarding sex, { reproduction | and for important { | scientific facts { | In the broadest { heredity and eugenics | for sexual conduct outlook, sex-education { | leading to race (or sex-instruction) { | improvement includes: { | { ethics and sociology | for sexual conduct { of sex | { | { psychology of sex | for sexual health { | and conduct { | { aesthetics of sex | for attitude [Sidenote: Sex and reproduction.] Since the original purpose of sex was perpetuation of plant and animal species, and since in the study of biology the idea of sex is illustrated and developed by examination of the reproductive processes in various types, it has been customary for many writers on sex-education to use the terms "sex" and "reproduction" as if they were synonymous. This is no longer so in human life; for while reproduction is a sexual process, sexual activities and influences are often quite unrelated to reproduction. In fact, most of the big problems that have made sex-education desirable, if not necessary, are problems of sex apart from reproduction. It therefore seems clear that, while studies of reproduction are prominent in sex-education, they should be regarded as introductory to the problems of sex, especially for young people. Sec. 2. _The Misunderstanding of Sex_ [Sidenote: Objection to word "sex."] Some educators have expressed the wish that some one might suggest a satisfactory substitute for the terms "sex-hygiene" and "sex-education," omitting the word "sex." This word and its companion "sexual" are objectionable because they are associated in the minds of most people with vulgar interpretation of the physical aspects of the beginning of individual life, and much of the opposition to the proposed sex-instruction in home and schools is evidently based on the feeling that the very word "sex" involves something inherently vulgar. [Sidenote: Definite words necessary.]