The beardless were 12.1 per cent., those with no axillary hair 9 per cent., those with no hair on pubis 0.4 per cent. This corresponds with the fact that hair appears first on the pubis and last on the chin.
In the first class 69 per cent, were beardless, 54 per cent, without any axillary hair and 6 per cent, without pubic hair. In the second class 24 per cent, were beardless, 17 per cent, without axillary hair. In the third class 3 per cent, were beardless and 3 per cent without axillary hair.
Below puberty the diameter of testicles is below 14 millimeters. There were 13 conscripts having a testicular diameter of less than 14 millimeters. These infantile individuals all belonged to the first 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 Révision," 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 found to possess some value as signs of the impulse may themselves either be healthy or morbid. This is notably the case as regards an abnormal growth of hair on the body, more especially when it appears on regions where normally there is little or no hair. Such hypertrichosis is frequently degenerative in character, though still often associated with the sexual system. When, however, it is thus a degenerative character of sexual nature, having its origin in some abnormal fœtal condition or later atrophy of the ovaries, it is no necessary indication of any aptitude for detumescence.
Idiots, more especially it would seem idiot girls, tend to show a highly developed hairy system. Thus Voisin, when investigating 150 idiot and imbecile girls, found the hair long and thick and tending to occupy a large surface; one girl had hair on the areolæ of the mamma. (J. Voisin, "Conformation des organes génitaux chez les Idiots," Annales d'Hygiène Publique, June, 1894.) It should be said that in idiot boys puberty is late, and the sexual organs as well as the sexual instinct frequently undeveloped, while in idiot girls there is no delay in puberty, and the sexual organs and instinct are frequently fully and even abnormally developed.
Hegar has described an interesting case showing an association, of fœtal origin, between sexual anomaly and abnormal hairness. In this case a girl of 16 had a uterus duplex, an infantile pelvis, very slight menstruation and undeveloped breasts. She was very hairy on the face, the anterior aspects of the chest and abdomen, the sexual regions, and the thighs, but not specially so on the rest of the body. The hairs were of lanugo-like character, but dark in color. (A. Hegar, Beiträge zur Geburtshülfe und Gynäkologie, vol. i, p. III, 1898.) Sometimes hiruties of the face and abdomen begin to appear during pregnancy, apparently from disease or degeneration of the ovaries. (A case is noted in British Medical Journal, August 2 and 16, pp. 375 and 436, 1902.) Laycock many years ago referred to the popular belief that women who have hair on the upper lip seldom bear children, and regarded this opinion as "questionless founded on fact." (Laycock, Nervous Diseases of Women, p. 22.) When this is so, we may suppose that the abnormal hairy growth is associated with degeneration of the ovaries.
There is another factor which enters into this question and renders the definition of a physical sexual type less precise than it would otherwise be. The sexual instinct is common to all persons, and while it seems probable that there is a type of person in whom sexual energies are predominant, it would also appear that the people who otherwise show a very high level of energy in life usually exhibit a more than average degree of energy in matters of love. The predominantly sexual type, as we have seen, tends to be associated with a high degree of pigmentation; the person specially apt for detumescence inclines to belong to the dark rather than to the purely fair group of the population. On the other hand, the active, energetic, practical man, the man who is most apt for the achievement of success in life, tends to belong to the fair rather than to the dark type.[[168]] Thus we have a certain conflict of tendencies, and it becomes possible to assert that while persons with pronounced aptitude for sexual detumescence tend to be dark, persons whose pronounced energy in sexual matters tends to ensure success are most likely to be fair.