Jean-Marie Goulemot said this quote

“ By appealing to his imagination, a pornographic novel brings the reader’s body into play; libertine fiction appeals only to his mind. The goal of the former is erotic pleasure, or rather the desire to experience erotic pleasure, which the pornographic novel, obviously, cannot satisfy by itself. It is in this regard merely an intermediary, a stimulant, a kind of literary pimp.With libertine fiction, the goal is that of overcoming the prejudices of some of the characters, which are assumed to be the same as those of the reader. The reader is somewhat the equivalent of the fictional object of seduction. ”