 Caning , a common aspect of 19th @-@ century teaching , is prevalent in many of his works , for example Meister Druff in Adventures of a Bachelor and Lehrer Bokelmann in Plish and Plum , where is shown an almost sexual pleasure in applying punishment . Beatings and humiliation are found in his later work too ; biographer Gudrun Schury described this as Busch 's life @-@ motif . 
