On the 2010 track, widely rumored to be about her fling with Mayer, Swift sang "Don't you think I was too young to be messed with?" At the time of their rumored relationship, Swift was about 20 years old.
Mayer doesn't make any direct references to his ex-flame, but he has written lyrics that could be interpreted as digs at Swift's lyrics and song titles.
"You're like 22 girls in one/ And none of them know what they're running from/ Was it just too far to fall for a little paper doll?" Mayer sings in the chorus. According to US Weekly, the "22 girls" line could refer to Swift's single, "22." In "Dear John," she previously sang, "I'll look back and regret how I ignored when they said run as fast as you can."
According to USA Today, Mayer's line, "Someone's gonna paint you another sky," could recall Swift's lyric, "You paint me a blue sky and go back and turn it to rain."
MTV points out that in "Dear John," Swift called her self "the girl in the dress."
""Here's a dress of gold and blue/Sure was fun being good to you," Mayer sings in "Paper Doll."
Mayer told Rolling Stone last year that Swift's song had "humiliated" him, though Swift later called her ex "presumptuous" for assuming the song was about him.