Taylor Swift
1. She was jealous of Katy's success and #1's with TD so she decided to try pop as well.
2. Katy Perry gets men easily because of her boobalicious figure so she gets more songwriting inspiration
3. John Mayer dated Katy, and their relationship lasted longer as compared to when Taylor with John which implies that Katy is better in bed than her
4. Taylor is mad people in general (e.g. dancers, children, etc) prefer Katy more
