Sex-education in its largest sense includes all scientific, ethical, social, and religious instruction and influence which directly and indirectly may help young people prepare to solve for themselves the problems of sex that inevitably come in some form into the life of every normal human individual. Note the carefully guarded phrase "help young people prepare to solve for themselves the problems of sex", for, like education in general, special sex-education cannot possibly do more than help the individual prepare to face the problems of life.

More than sex-hygiene.

Now, sex-education as thus defined is more extensive than sex-hygiene, which term was originally applied to instruction concerning sex. Sex-hygiene obviously refers to health as influenced by sexual processes, and as such it is a convenient subdivision of the science of health. It would be quite satisfactory as a name for popular instruction concerning sex if that were strictly, or even primarily, hygienic; but in a later lecture it will be shown that the most desirable sex-instruction is only in a minor part a problem of hygiene. I realize that this statement may be declared heretical by many of the present-day advocates of sex-hygiene, because they have approached this latest educational movement from the standpoint of physical health, and especially because their attention has been drawn to the very common occurrence of pathological conditions. Nevertheless, the sexual problems of our times do not all affect physical health, which hygiene aims to conserve; and the sex-educational movement will be quite inadequate without great stress upon certain ethical, social, and other aspects of sex. Young people need instruction that relates not only to health but also to attitude and to morals as these three are influenced by sexual instincts and relationships. This idea will be developed later, but I anticipate here simply to suggest the point of view of the statement that "sex-hygiene" is altogether too limited as a general designation for the desirable instruction concerning sex. The continued use of the term "sex-hygiene," now that the scope of the desirable sex-instruction has been extended far beyond the accepted limits of the science of health, is tending to cause confusion. The educational problems will be more definite and the support of the intelligent public more assured if we limit the use of "sex-hygiene" to the specific problems of health as affected by sexual processes and cease trying to make it include those phases of sex-instruction which have nothing directly to do with health.

Two general terms, "sex-instruction" and "sex-education," are available as all-inclusive designations of the desirable instruction concerning any aspects of sex. They are quite free from the above objections to "sex-hygiene," and it is highly desirable that they should be used in all educational discussions where there is no specific reference to the problems of health. Sex-hygiene will be used in these lectures only when there is some direct reference to health as influenced by the sexual functions.

Social hygiene.

Social hygiene in its complete sense means the great general movement for the improvement of the conditions of life in all lines in which there is social ill health or need of social reform; but it is often limited to the sexual aspect of the unfortunate and unfavorable conditions of life, and it has been proposed to adopt the term "social hygiene" as a substitute that avoids the word "sex" in sex-hygiene. For this reason it has been incorporated into the names of several societies that are interested in sex-hygiene (e.g., the American Social Hygiene Association). Probably the relation of sex-hygiene to the so-called "social evil" has suggested the use of social hygiene in its most limited sense. It will be unfortunate if this usage becomes so prominent that we think of the health problems of society as chiefly sexual, for the larger outlook of Ellis's "Task of Social Hygiene" is desirable. Likewise, the phrase "social evil" in the sense of sexual evil misleadingly suggests that the only evil of society is the sexual one, but this evasive designation is being supplanted by the more definite and franker word "prostitution."

It should be noted that "social hygiene" as a substitute for "sex-hygiene" is narrower in that it does not include the personal problems of health as affected by sexual processes. This is a serious omission, for certainly all sex-hygiene taught before the later adolescent years should be personal and not social.

Phases of sex-education.

The relation of sex-hygiene or social hygiene as a limited phase of sex-education is shown by the following outline:

In the broadest outlook, sex-education (or sex-instruction) includes: sex-hygiene (personal, social)for sexual health
biology (including physiology) of reproductionfor attitude regarding sex, and for important scientific facts
heredity and eugenicsfor sexual conduct leading to race improvement
ethics and sociology of sexfor sexual conduct
psychology of sexfor sexual health and conduct
æsthetics of sexfor attitude