the garments, is the simplest and commonest foundation of erotic
symbolism. It is without doubt absolutely normal. It is inevitable that
those objects which have been in close contact with the beloved person's
body, and are intimately associated with that person in the lover's mind,
should possess a little of the same virtue, the same emotional potency. It
is a phenomenon closely analogous to that by which the relics of saints
are held to possess a singular virtue. But it becomes somewhat less normal
when the garment is regarded as essential even in the presence of the
beloved person.[10]

While an extremely large number of objects and acts may be found to
possess occasionally the value of erotic symbols, such symbols most
frequently fall into certain well-defined groups. A vast number of
isolated objects or acts may be exceptionally the focus of erotic
contemplation, but the objects and acts which frequently become thus
symbolic are comparatively few.

It seems to me that the phenomena of erotic symbolism may be most
conveniently grouped in three great classes, on the basis of the objects
or acts which arouse them.

I. PARTS OF THE BODY.--_A. Normal:_ Hand, foot, breasts, nates, hair,
secretions and excretions, etc.

_B. Abnormal:_ Lameness, squinting, pitting of smallpox, etc. Paidophilia
or the love of children, presbyophilia or the love of the aged, and
necrophilia or the attraction for corpses, may be included under this
head, as well as the excitement caused by various animals.