and Significance. The Psychology of Tickling.
Laughter. Laughter as a Kind of Detumescence. The Sexual Relationships of
Itching. The Pleasure of Tickling. Its Decrease with Age and Sexual
Activity.

III.

The Secondary Sexual Skin Centres. Orificial Contacts. Cunnilingus and
Fellatio. The Kiss. The Nipples. The Sympathy of the Breasts with the
Primary Sexual Centres. This Connection Operative both through the Nerves
and through the Blood. The Influence of Lactation on the Sexual Centres.
Suckling and Sexual Emotion. The Significance of the Association between
Suckling and Sexual Emotion. The Association as a Cause of Sexual
Perversity.

IV.

The Bath. Antagonism of Primitive Christianity to the Cult of the Skin.
Its Cult of Personal Filth. The Reasons which Justified this Attitude. The
World-wide Tendency to Association between Extreme Cleanliness and Sexual
Licentiousness. The Immorality Associated with Public Baths in Europe down
to Modern Times.

V.

Summary. Fundamental Importance of Touch. The Skin the Mother of All the
Other Senses.

SMELL.

I.

The Primitiveness of Smell. The Anatomical Seat of the Olfactory Centres.
Predominance of Smell among the Lower Mammals. Its Diminished Importance
in Man. The Attention Paid to Odors by Savages.

II.

Rise of the Study of Olfaction. Cloquet. Zwaardemaker. The Theory of
Smell. The Classification of Odors. The Special Characteristics of
Olfactory Sensation in Man. Smell as the Sense of Imagination. Odors as
Nervous Stimulants. Vasomotor and Muscular Effects. Odorous Substances as
Drugs.

III.

The Specific Body Odors of Various Peoples. The Negro, etc. The European.
The Ability to Distinguish Individuals by Smell. The Odor of Sanctity. The
Odor of Death. The Odors of Different Parts of the Body. The Appearance of
Specific Odors at Puberty. The Odors of Sexual Excitement. The Odors of
Menstruation. Body Odors as a Secondary Sexual Character. The Custom of
Salutation by Smell. The Kiss. Sexual Selection by Smell. The Alleged
Association between Size of Nose and Sexual Vigor. The Probably Intimate
Relationship between the Olfactory and Genital Spheres. Reflex Influences
from the Nose. Reflex Influences from the Genital Sphere. Olfactory
Hallucinations in Insanity as Related to Sexual States. The Olfactive
Type. The Sense of Smell in Neurasthenic and Allied States. In Certain
Poets and Novelists. Olfactory Fetichism. The Part Played by Olfaction in
Normal