But from Taylor's Rolling Stone article, the song does reference a guy in some form. I'm not saying it's for sure about Harry, but I doubt it's only about "good girls going out of style" either.
Quote:
Then there's the song that sets a new high-water mark for Swiftian faux secrecy – a sexy Miami Vice-sounding throwback about a guy with slicked-back hair and a white T-shirt and a girl in a tight little skirt that is called – no joke – "Style." (She allows herself a satisfied grin. "We should have just called it 'I'm Not Even Sorry.'")