The pair dated briefly in October of 2010, only to break up that December. Still, the relationship appeared to have a lasting effect on the young star - especially the loss of a good scarf.
Swift's lyrics mention a scarf, which Swift famously wore in the first paparazzi snaps of the couple. "Left my scarf there at your sister's house / And you still got it in your drawer," goes one line. She wore the scarf when she went to Maggie Gyllenhaal's place (that'd be the sister) for Thanksgiving.