Watching a slow-burn build to a boil between two characters with incredible chemistry, until they can't take it any more and simply must have each other? Seeing somebody who has been buttoned-up and reserved for the first two acts let go of their inhibitions and get down? Gasping as people who hate each other bang it out? Well, you're getting narrative satisfaction there as well as carnal. Sure, porn will give you all of the body parts doing all of the things, but when it comes to watching a movie (of the non-adult variety), there's a lot to be said about the framing and context of the act. What makes an effective sex scene? Well, it's as much about what the filmmaker chooses not to reveal as what they do show the viewer.
