Most people I know with EDs say that their parents (particularly moms) were obsessed with diets and weight in a really unhealthy way and it was just an adopted behavior. There are other factors of course, but that seems to be a common risk factor. I have two very young daughters and I never mention any of that stuff to them - including the word fat. I just don't use it (except in my head, of course.) It feels too risky.