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"It made me feel terrible," Mayer, 34, says -- speaking out about the song for the first time in the new issue of Rolling Stone. "Because I didn't deserve it. 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."
If the song's lyrics are to be believed, Mayer did some lousy things to her, too. "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?" goes the song, off Swift's 2010 album Speak Now (which, coincidentally, was recorded shortly after her split with Mayer).
When Rolling Stone asks Mayer about that particualr lyric, he replies, "I don't want to go into that."
Fair enough -- but it seems that Mayer is most upset by the fact that Swift released the song without first talking to him.
"I never got an e-mail. I never got a phone call," he says. "I was really caught off-guard, and it really humiliated me at a time when I'd already been dressed down. I mean, how would you feel if, at the lowest you've ever been, someone kicked you even lower?"
Mayer recently apologized to exes Jessica Simpson and Jennifer Aniston for the tell-all interviews he conducted several years back in Playboy and Rolling Stone, respectively. It doesn't sound like an apology is going to be coming for Swift, though.
"I will say as a songwriter that I think it's kind of cheap songwriting," he says of "Dear John." "I know she's the biggest thing in the world, and I'm not trying to sink anybody's ship, but I think it's abusing your talent to rub your hands together and go, 'Wait till he gets a load of this!' That's bulls***."