Rosy believes that "fat is beautiful" and has a steady diet of fried chicken, french fries, and cheeseburgers. tanya believes that "thin is in" and uses vomiting and laxatives as a way to keep her weight down. both girls exhibit what psychologists call:

There's two words for it because they are both different. Rosy is going through bulimia. She will eat and throw up and her body will get used to it. Tanya is going through Anorexia where she will vomit if she eats. Both of these things are bad for the body and can ruin anyone's life for a long period of time. Maybe even forever, so keep and maintain a balanced diet. 

Court judicial bramch