According to Wikipedia
Erotic literature comprises fictional and factual stories and accounts of eros – passionate, romantic or sexual relationships – intended to arouse similar feelings in readers, in contrast to erotica, which focuses more specifically on sexual feelings. Erotic literature can take the form of novels, short stories, poetry, true-life memoirs, and sex manuals. A common feature of the genre is sexual fantasies on such themes as prostitution, orgies, sadomasochism, and many other taboo subjects and fetishes, which may or may not be expressed in explicit language. Other common elements are satire and social criticism. Much erotic literature features erotic art, illustrating the text.