Swift, 22, who recently added Conor Kennedy to her extensive list of exes that includes John Mayer, Joe Jonas, Jake Gyllenhaal and Taylor Lautner, said she once told a boyfriend that she would not write a song about him and then ended up doing it anyway, reported Radar online.
"The only time that has ever crossed someone's mind was when we were in the process of breaking up. Of course I was like, 'Oh, don't worry, I won't' And then I did," she said.
"Look, it's not like it was written somewhere in the fine print that I write songs about my life. If we break up, I'm going to write about it. But I'm probably also going to write about when I fell in love with you. So there's an upside," she said.