So if your peers have a nice fat ass that the boys all like to oggle at while walking between classes and you're stuck with a skinny thigh gapping flapjack white girl tush you bet your ass you're gonna start eating some cheese berders.
The feeling of wanting to fit in is constant for teens. What 'fitting in' looks like changes over time.
What's desired has changed over time in my life alone. Booty is a great example. I grew up with mostly white women in media shaming themselves and asking if their dress made their ass look fat while also trying to get boob implants.
Nowadays booty is WAAAAY more prominent and desired and those old tired jokes about their ass looking fat a hell of a lot less common.
From the show Brockmire: