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There is one motive for the existence of coprolagnia which must not be passed over, because it has doubtless frequently served as a mode of transition to what, taken by itself, may well seem the least æsthetically attractive of erotic symbols.

Still coprolagnia occurs and not so very infrequently.

In this way the erotic symbolism of urolagnia and coprolagnia is completely analogous with that dynamic symbolism of the clinging and swinging garments which Herrick has so accurately described, with the complex symbolism of flagellation and its play of the rod against the blushing and trembling nates, with the symbols of sexual strain and stress which are embodied in the foot and the act of treading.

Moll has recorded in detail a case of what may be described as "ideal coprolagnia"—that is to say, where the symbolism, though fully developed in imagination, was not carried into real life—which is of great interest because it shows how, in a very intelligent subject, the deviated symbolism may become highly developed and irradiate all the views of life in the same way as the normal impulse.

The coprolagnia here, however, had its source in a childish impression of admiration for the nates.