wn. Its complete disappearance will
have a vast influence upon the problem of sexual attitude.

Sec. 12. _The Seventh Problem for Sex-instruction: Marriage_

[Sidenote: Physiology and psychology of marriage.]

It is the consensus of opinion of numerous physicians, ministers, and
lawyers that a very large proportion of matrimonial disharmonies have
their foundation in the common misunderstanding of the physiology and
especially of the psychology of sex. In the opinion of many students of
sexual problems, this is the strongest reason for sex-instruction. It
is certainly a line in which limited spread of information has already
given some definite and satisfactory results. Many of my friends and
former students have helped me accumulate a long list of cases in which
scientific knowledge regarding sex has prevented and corrected
matrimonial disagreements; and having easily found so much definite
influence of sex-science upon marriage, I am forced to believe that
sex-instruction specially organized for people of marriageable age is
already giving results of tremendous importance to very many
individuals. Large numbers of young people are already awake to the
need of scientific guidance in marriage, and there is a great demand
for helpful information.

Advanced sex-instruction with reference to the problems of marriage
need not wait for general establishment of elementary instruction for
children of school ages. Lectures and books are already reaching large
numbers of adults. Such enlightenment will help in two ways, by the
influence on marriage and by preparing adults to teach children.

[Sidenote: Other knowledge needed.]

There is another side to the problem of marriage that points to need of
the larger sex-education. Physiology and psychology of sex are
fundamental; but they alone are not sufficient to complete that mutual
adjustment and understanding which marriage at the full development of
its possibilities involves. Matrimonial harmony cannot be entirely a
problem of applied science, as some superficial devotees of science
seem to think; for science can never analyze those subtle and
ever-varying qualities that go to make up what we call personality, and
marriage in its largest outlook is the intimate blending of two
personalities. Psychological and physiological knowledge will
undoubtedly help the two married individuals in their progress towards
the harmonious adjustment of their individualities; but there a