(October 4, 2012)-- "Presumptuous" is the word that Taylor Swift chose to describe John Mayer in a recent interview with Glamour magazine.

Mayer took Swift's song "Dear John" personally and told Rolling Stone said that he was "really humiliated" by the lyrics, which made made him feel "terrible."

But Swift, who is featured on the cover of Glamour's November issue, said she never discloses who her songs are about and she doesn't want to know the specifics of what Mayer said.

That’s because she says she puts a "high priority on staying happy" and knows what she "can't handle."

Swift explained it's not because she's an "egomaniac" who doesn't want to hear anything negative about herself.

She said it's because she "never developed that thick a skin."