I find the relationship between Batman and Catwoman in comics very erotic. Come to think of it, it's sexier to me in the comics than it is in the movies. It certainly helps that they have the bodies of Greek statues. Another thing that comes into play is that because it's serialized, the story just has a ton of depth.

I'm not sure if this seems similar to your orientation, Sephiida, or experience but I thought it might be interesting to you.