Listening to the song, I think it's about porn, but it could also be about somebody's obsession with porn, or a particular image or fantasy (as the music video illustrates perfectly). Alternatively, the song could be about a guy who's in love with somebody he doesn't know, and all he has is an image. In a broader sense, I think the song is about obsession, an individual obsession that is fuelled by a broader collective obsession with celebrity body image.
Listening to the song, I think it's about porn, but it could also be about somebody's obsession with porn, or a particular image or fantasy (as the music video illustrates perfectly). Alternatively, the song could be about a guy who's in love with somebody he doesn't know, and all he has is an image. In a broader sense, I think the song is about obsession, an individual obsession that is fuelled by a broader collective obsession with celebrity body image.