Yes, Luthienne, erotica is interesting. A suggest a Nin book for starters. Delta of Venus or Little Birds, perhaps. You should try Little Birds too, annais.
I, too, am not sure how to distinguish the two. In the bookstores, there are simply classified as Adult Fiction. I would like to take Jenna Jameson's book "How to Make Love Like a Porn Star". It's classified Adult Fiction but that is clearly porn.