“…To Kraepelin, several compulsive phenomena -such as the inclination to calculate or count, to change/reverse words, to remember things, to follow certain rules when walking-can be found in children quite frequently, yet they might wear off later on. Recent studies have confirmed some of Kraepelin's observations, including increased prevalence of counting symptoms 28 and a favorable outcome of OCD in children. 29 Kraepelin also referred to ''primary compulsive drives'' or urges (primä re Zwangsantriebe according to Lö wenfeld 30 ), which were ''sparse acts'' restricted to ''extremely harmless expressions'' often occurring only once, like one isolated episode of cursing when celebrating something, intermixing blasphemic expressions into prayers, coprolalic episodes, or throwing an object onto the ground [IV, 1874].…”