Then things get complicated
Earlier today, the story broke that the songwriting credit for "This Is What You Came For" was at the heart of the Harris-Swift breakup. According to TMZ, Swift wrote the song and sent it to Harris, and they both went into the studio to do a full demo version with Swift on vocals, but agreed that they didn't want their relationship to overshadow the song. Instead, Swift would use a pseudonym. Enter: Nils Sjöberg, a name that sounds like a famous sommelier or a composer who summers with the dudes from Sigur Rós.
According to TMZ's sources in the Swift camp, everything was cool until Harris, while promoting his new hit song, appeared on Ryan Seacrest's radio show in April and downplayed the idea of ever collaborating with Swift. "You know, we haven't even spoken about it," he told Seacrest. "I can't see it happening." Apparently, this comment hurt Swift and played a role in the end of their relationship.