passional emotion. All these thrills of pleasurable emotion
possess a psychic value, and, so long as the nervous system is
kept in perfect health, they do not seem to have the power to
injure, but rather one is able to utilize the passionate emotions
as weapons for pleasure and work."

Various parts of the skin surface appear to have special sexual
sensitiveness, peculiarly marked in many individuals, especially
women; so that, as Féré remarks (_L'Instinct Sexuel_, second
edition, 1902, p. 130), contact stimulation of the lips, lobe of
ear, nape of neck, little finger, knee, etc., may suffice even to
produce the orgasm. Some sexually hyperæsthetic women, as has
already been noted, experience this when shaking hands with a man
who is attractive to them. In some neurotic persons this
sensibility, as Féré shows, may exist in so morbid a degree that
even the contact of the sensitive spot with unattractive persons
or inanimate objects may produce the orgasm. In this connection
reference may be made to the well-known fact that in some
hysterical subjects there are so-called "erogenous zones" simple
pressure on which suffices to evoke the complete orgasm. There
is, perhaps, some significance, from our present point of view,
in the fact that, as emphasized by Savill ("Hysterical Skin
Symptoms," _Lancet_, January 30, 1904), the skin is one of the
very best places to study hysteria.

The intimate connection between the skin and the sexual sphere is
also shown in pathological conditions of the skin, especially in
acne as well as simple pimples on the face. The sexual
development of puberty involves a development of hair in various
regions of the body which previously were hairless. As, however,