Anaïs Nin's collection of racy short stories originated in the early 1940s as commissioned pornographic bits. 

Nin and her Paris café society friends had to eat, so they put their literary ambitions aside and created porn, prompting Nin to crown herself the "madame of an unusual house of literary prostitution." Nin, who is adored today for her feminine, poetic style, was asked to cut her usual flowery fancies and focus on the old in and out, but she still infuses the prose with her signature dreamy elegance. Some of the material (incest, rape, necrophilia) is absolutely shocking. But keep in mind that these are fantasies intended to stimulate, not to be taken at face value.