There are plot points that would naturally happen during sex. For example, a character accidentally blurting out a secret in a moment of passion. Or using the o

There are plot points that would naturally happen during sex. For example, a character accidentally blurting out a secret in a moment of passion. Or using the other person's lust-filled single-minded focus to distract, deceive, or betray them in the heat of the moment. Or you might want to show a different side of a character that only comes out occasionally. Maybe the character is normally reserved but becomes wild during sex. Or they are normally distant but become intimate during sex. My point is that sex scenes are not always just crowd-pleasing filler that is extraneous to the rest of the movie. A good writer and/or director could probably make pretty much any point without explicitly showing sex, but why not just do it while explicitly showing sex? Sex is a part of real human life after all, so it would be strange if the only movies that showed sex were pornos.