Good Male Written Romance Books for Study

I'm looking for male written romance novels as the title suggests, female written is okay if its really above and beyond. I'm hoping for things like Francois Mauriac and Nabokov, with weird and deviant pairings and a greater focus on the mental state of the couple and their sexual dynamics. Anything specifically SciFi or Fantasy would be great, though I would prefer that the romance was the center stage storyline. As an aside, what do you guys think makes a romance story good and what would draw you too one if you're not interested in romance normally?