In "The Evolution of Modesty," in the first volume of these Studies, and again in the fifth volume in discussing urolagnia in the study of "Erotic Symbolism," the mutual reactions of the sexual and excretory centres were fully dealt with.
"La Morale Sexuelle," Archives d'Anthropologie Criminelle, Jan., 1907.
The above passage, now slightly modified, originally formed an unpublished part of an essay on Walt Whitman in The New Spirit, first issued in 1889.