It sounds like a reasonable question: "What is your ideal body weight?" But beware: this is a technical term that is often confused for what it sounds like: an aesthetic ideal.
body image – Eating Disorder Recovery
Have you noticed that it is just assumed in our society that everyone wants to be thin? Thin is never defined, and seems to mean "smaller than anyone else in the room." Everyone seems to agree that being thinner is a constant quest, and that the only difference between people with an eating disorder and everyone else is how strong that "drive for thinness" is. I don't buy it, and I'll tell you why.
It is often assumed that eating disorders occur because of poor body image. I believe the relationship between the two is far more complicated. In fact, VERY complicated.