I think your audience will matter. If you were to ask my husband, I don't even think he is really even interested in erotic literature. From the female perspective though, a lot of it has to do with the background of those involved. I like reading things about real people. Seeing sex through the eyes of normal life is hot to me. Sure, it's exciting to read about someone sucking on or licking some body part, but the real page turner for me is learning about the person and what makes them excited, or, experiences that are an escape for them from every day life. Especially when it's about things that you would least expect in normal life. It also helps if there is a naughtiness or taboo factor to it. If someone is doing something they shouldn't be doing, that makes my temperature rise very quickly.