Alright. Here we go.
I am sick to death of all the overdone token eating disorder fics that seem to leap out from behind every fandom lamp-post. I mean, I get it - eating disorders are srs business, you know this, you suffer from one or have a friend who suffers from one, so you want to show the world what horrors lie in wait for those who starve themselves, etc. I'm not personally a fan of the whole ED genre because I very seldom find it done well, but if you feel absolutely compelled to turn your favourite character into an obsessive calorie counter or b/p-er, please bear in mind:
1. It's not always about being thin. Not everybody who has an eating disorder looks in the mirror and sees a grotesquely fat individual staring back at them. For some people it's about control, an escape from an uncontrollable world through something that's solid and definite. For others, it's self-punishment. Denying yourself food is brutally destructive and painful. A lot of eating-disordered girls have been sexually assaulted, and it can become their defense mechanism - making themselves as skeletal and sexually unattractive as possible keeps them safe from further attack. Some people are hurting and just want their bodies to reflect how fragile they feel. It can be all of these reasons, or none. There are all kinds of motivations for eating-disordered behaviour. It doesn't have to be about looking like the cover-girl of a Vogue magazine.
Also, I would like to draw fandom's attention to the fact that said Vogue aesthetic is a cultural thing. 'Skinny' has only very recently become synonymous with 'attractive' in the eyes of pop culture. People far removed from this culture are unlikely to be convinced that weighing 45 kilos will make them beautiful. Hermione Granger probably isn't overly fussed about having a supermodel's body. Legolas probably doesn't look at his reflection in puddles and go 'oh man, I wish I looked more like Mary-Kate Olsen.' Lucy Pevensie isn't going to adopt 'bones are beautiful' as her motto for life.
2. Anorexia is not the only way. The 'perfect anorexic' doesn't really exist. Real anorexics don't live off air and water - their daily intake is insufficient and highly regimented, but they still eat. Also, they fluctuate. They fuck up, they decide to 'get better' and then relapse, and sometimes they'll eat a lot more or less than other times. Bulimic behaviour is even less predictable - they are usually (and I'm generalizing) much less regimented in pretty much everything. They're likely to be more openly out of control. Also, middle ground is possible. Not everyone has to be The Most Extreme Anorexic Evar. Ever heard of ED-NOS? Binge-Eating Disorder? There are plenty of ways to have messed-up attitudes to food without subsisting on two cornflakes a day.
3. Cuddles and tearful catharses do not fix eating disorders. The End.