actually anorexia is diagnosed when a patient is a certain amount underneath the minimal weight for their age/height etc. There is a binging component to bulimia as far as i know but also one of the main hallmarks of it is the compensatory behaviour - not just puking, but using exercise, laxatives, etc.
Man, I would love to go out on a date with this girl. I'd bring her a flower and she'd smell it and smell it. Then I'd eat a big meal and make yummy noises the whole time and think about how hungry she is. She'd be staring at my plate and her mouth would be all watering. She's taking little sips of water and squirming in her chair. So filled with desire. So weakened by hunger. She's helpless. She's starving. All she wants is something in her mouth, something to fill her. Satisfy her.
Nourishment. I have your nourishment. I am your sustenance.
Waitaminute. She's the kind of skinny that barfs? Ew. Wrong kind of skinny. No barfing here, don't talk with your filthy mouth full. You're dirty.