She's known for writing songs that well basically bash her exes but she says it's not just one sided..

“If I’m gonna write songs about my exes, they can write songs about me. That’s how it works.”

That's fair but if they start doing that I kinda feel bad for her... John Mayer... One Direction or maybe her actor beaus will portray her  :0

...Or maybe they are just bigger and more mature about things