At some point between December 2009 and February 2010, Mayer struck up a brief romance with Swift after they collaborated on his song "Half of My Heart." Unfortunately things between them quickly soured. Swift ended up writing a harsh breakup song about him, "Dear John," and all but confirmed it was about the musician. "There are things that were little nuances of the relationship, little hints," she revealed to the International Business Times. "Everyone will know, so I don't really have to send out emails on this one."
Thanks to lyrics like "Dear John, I see it all, now it was wrong / Don't you think 19 is too young to be played by your dark twisted games, when I loved you so?," the "Daughters" singer wasn't thrilled. "It made me feel terrible, because I didn't deserve it," he explained in a 2012 interview with Rolling Stone. "I'm pretty good at taking accountability now, and I never did anything to deserve that. It was a really lousy thing for her to do." Fortunately, Mayer also seems to have gotten his chance to respond via song with his 2013 tune "Paper Doll," which, per Vanity Fair, many believe is about Swift.
