You don't know what it's like to grow up a fat girl in a thin world.  An array of eating disorders and exercise machines floating around you everyday reminding you of the biggest "imperfection" known to mankind.  Raised in the country known for its "Obesity Epidemic" with fast food joints and a Starbucks on every corner calling to you.
But maybe it's not what you eat or what you do, maybe it's your genetics that have cursed you to grow up with the curves of hips and a naturally large chest, even a not-so-flat stomach.  G-d forbid you look like a woman.  G-d forbid you're able to be proud of the parts men find the most attractive.  
Maybe you should stop eating and exercise more.  No, stick your finger down your throat and puke until you see the carrots you use as a marker when to stop.  Purge your body of all the "waste" you put into it.
Calories, pollution to your body.  Fat, the bane of your existence, your worst enemy.  Fat is for the ugly.  Muscle, not an option.  Muscles are for men.  If you're thin, you're in.
Well aren't you unlucky. Oh, by the way, FUCK YOU TWIGGY.