Sex and pain.
I'll tell you why I said that. I ordered a DVD (called "The Image") that was advertised as "the most erotic movie ever" and "more explicit than La Bete" and a bunch of other nice things. Turns out it's an S&M film, which wouldn't be so bad except it's pretty hard S and pretty soft sex: whips, bondage, hot pokers, humiliation, and pretty real pain; with some FFN but nothing very graphic.
Nein danke.
Sorry, that's not "erotic" to me. Maybe for some people sex must be accompanied by pain and humiliation (Catholics maybe) but personally I find that extremely distasteful. I can't even appreciate it as a fetish. It just makes something ugly out of something that should be beautiful.