They are perversions in exactly the same sense as are the methods of
intercourse which involve the use of checks to prevent fecundation. The
æsthetic question, however, remains the same as if we were dealing with
tumescence. It is necessary that this should be pointed out clearly, even
at the risk of misapprehension, as confusions are here very common.

The essentially sexual character of the sensitivity of the
orificial contacts is shown by the fact that it may sometimes be
accidentally developed even in early childhood. This is well
illustrated in a case recorded by Féré. A little girl of 4, of
nervous temperament and liable to fits of anger in which she
would roll on the ground and tear her clothes, once ran out into
the garden in such a fit of temper and threw herself on the lawn
in a half-naked condition. As she lay there two dogs with whom
she was accustomed to play came up and began to lick the
uncovered parts of the body. It so happened that as one dog
licked her mouth the other licked her sexual parts. She
experienced a shock of intense sensation which she could never
forget and never describe, accompanied by a delicious tension of
the sexual organs. She rose and ran away with a feeling of shame,
though she could not comprehend what had happened. The impression
thus made was so profound that it persisted throughout life and
served as the point of departure of sexual perversions, while the
contact of a dog's tongue with her mouth alone afterward sufficed
to evoke sexual pleasure. (Féré, _Archives de Neurologie_, 1903,
No. 90.)

I do not purpose to discuss here either _cunnilingus_ (the
apposition of the mouth to the female pudendum) or _fellatio_
(the apposition of the mouth to the male organ), the agent in the