In the run-up to me seeing this, I heard a lot of people saying simply this was "a film about relationships." I feel like that holds up quite well. More specifically, I felt like "Her" is a film about why relationships end. Using a motto I picked up from too many Dan Savage podcasts, all relationships end — not fail, just end — until one doesn't. Some end because someone is hurt. Some end because the people have grown into people that don't connect in the same way, and the biggest challenge in that case can be just accepting the change in a partner and in the self. ...So why couch this theme in science-fiction? I think it helps clarify Jonze's idea of what people look for during the first moments of a relationship — someone who acts a bright, positive, layered, but uncomplicated by a dark past or conflicted feelings. But even more interestingly, the hook of the film is mostly just that, a hook to get us thinking about love and relationships in a deeper, more abstract way.