t three classes and mostly to the first. The average
testicular diameter in the first class was nearly 24 millimeters,
and progressively rose in the succeeding classes to over 26
millimeters in the fourth.

While there was not much difference in height, the first class
was the shortest, the fourth the tallest. The fourth class also
showed the greatest chest perimeter. The cephalic index of all
classes was 84. (O. Ammon, "L'Infantilisme et le Feminisme au
Conseil de Revision," _L'Anthropologie_, May-June, 1896.)

We thus see that it is quite justifiable to admit a type of person who
possesses a more than average aptitude for detumescence. Such persons are
more likely to be short than tall; they will show a full development of
the secondary sexual characters; the voice will tend to be deep and the
eyes bright; the glandular activity of the skin will probably be marked,
the lips everted; there is a tendency to a more than average degree of
pigmentation, and there is frequently an abnormal prevalence of hair on
some parts of the body. While none of these signs, taken separately, can
be said to have any necessary connection with the sexual impulse, taken
altogether they indicate an organism that responds to the instinct of
detumescence with special aptitude or with marked energy. In these
respects observation, both scientific and popular, concords with the
probabilities suggested by the three standards in this matter which have
already been set forth.

No generalization, however, can here be set down in an absolute and
unqualified manner. There are definite reasons why this should be so.
There is, for instance, the highly important consideration that the sexual
impulse of the individual may be conspicuous in two quite distinct ways.
It may assume prominence because the individual possesses a highly
vigorous and well-nourished organism, or its prominence may be due to
mental irritation in a very morbid individual. In the latter
case--although occasionally the two sets of conditions are combined--most
of the signs we might expect in the former case may be absent. Indeed, the
sexual impulses which proceed from a morbid psychic irritability do not in
most cases indicate any special aptitude for detumescence at all; in that
largely lies their morbid character.

Again, just in the same way that the exaggerated impulse itself may either
be healthy or morbid, so the various characters which we have