scatology (adjective, scatological)
: literally the study of excrement; metaphorically, the study of verbal or graphic material legally defined as filthy or obscene and pertaining to sexual rather than excremental activity. A scatophilic telephone caller talks sexually in a manner that he expects will be offensive or shocking to a female listener who does not know him. He is dependent on this maneuver to obtain erotic arousal and facilitate or achieve orgasm.
Dictionary of Sexology Project: Main Index