ived of both ovaries, it leads her to
develop masculine physical characteristics and her temperament is
wholly lacking in those characteristics which, summed up, might, for
the want of a better term, be called FEMININITY.

CHAPTER IV.

SEXUAL HYGIENE OF THE ADOLESCENT MALE.

SEXUAL HYGIENE OF THE ADOLESCENT MALE.

No rational or acceptable system of sexual hygiene for the human male
can be worked out without constant reference to the lower ranks of the
mammalian class and to primitive social conditions.

In our study of the anatomy and physiology of the sexual apparatus of
the human male, it must have become evident that man has many things
in common with other mammals, and that no adequate knowledge of man's
physical or psychical attributes can be obtained without a study of
similar phases of life among related animals.

All of the changes which Nature introduced into the physical and
psychical development of the adolescent male were of a character to
equip the individual for the maintenance and protection of a wife and
children. This development has been reached by the time the young man
is twenty-one to twenty-three years of age, when, in the average case,
he would be able, so far as concerns his physique and temperament, to
establish and maintain a home. The fact that his adolescent
development is complete by the age of twenty-five, and that he has, by
the time he arrives at that age, grown into the full stature of all
his physical and mental powers, may certainly be interpreted as
nature's indication that his home-building should be begun not later
than the twenty-fifth year. This means, then, that young men ought, if
possible, to marry as young as twenty-five.

But the conditions of society at the present time are such that a
large proportion of the young men, particularly those who are
preparing for any of the learned professions (theology, medicine, law,
pedagogy, etc.) are hardly through their professional courses by the
time they reach that age, and most of them feel that they must make a
start in their profession before they assume the responsibilities of
supporting a home. This means that a large proportion of them marry as
late as thirty years of age.

If we consider now those commercial, financial and industrial
vocations which involve considerable preparation in technical
institutions or a long apprenticeship (engineering, pharmacy,
manufacturing chemists, banking, journalism, etc.