The key - Junichiro Tanizaki

These two modern classics by the great Japanese novelist Junichiro Tanizaki, both utilize the diary form to explore the authority that love and sex have over all.

In The Key, a middle-aged professor plies his wife of thirty years with any number of stimulants, from brandy to a handsome young lover, in order to reach new heights of pleasure. Their alternating diaries record their separate adventures, but whether for themselves or each other becomes the question. Diary of a Mad Old Man records, with alternating humor and sadness, seventy-seven-year-old Utsugi's discovery that even his stroke-ravaged body still contains a raging libido, especially in the unwitting presence of his chic, mysterious daughter-in-law.