Huffington Post has an article on how ereader novels that are erotica are becoming mainstream and very popular with women. article Erotica for men it seems has never caught on. Never quite understood it. Men can read and visualize. Both genders read fantasy and SF which needs a lot of mental visualization. Male erotica except for erotic westerns like Longarm is seemingly nonexistant for men, and Longarm is known by few.