Heartbreaker. Photo: Kevin Winter/TAS24/Getty Images While eras and adversaries may come and go, there’s one constant in Taylor Swift’s discography: emotional track fives . It’s long been a tradition for that coveted spot to be reserved for the most personal and vulnerable song of each album, and “Eldest Daughter” takes that slot on The Life of a Showgirl . But there’s another factor impacting each song’s placement on the track list. Fans with too much time on their hands realized that when