Joe is an ex-boyfriend of Taylors from the Fearless era. Joe is the first well known and famous man/boy she dated when starting out her career. During the Fearless time and era, taylor was very open on her relationships and specifically hers with Joe as well- good and bad. Often, after they broke up, Taylor would diss him publically. They are now friends many years later, which is concluded through the song invisible string from folklore. "Cold was the steel of my ax to grind for the boys who broke my heart; now I send their babies presents." For context, Joe and his now wife had a child sometime before folklore was dropped, and it is said that Taylor sent them baby shower gifts.