Imagine you live on a planet where scales have never been invented, where there is no concept of body weight at all, and no formulas like BMI have ever been conceived. On this planet, sex appeal is not used to sell or market cars, fragrances, or anything for that matter. There are no public images that tell people what's "attractive" and what's not. Friendships, social groups, and intimate relationships are a basic part of life, but physical appearance is only one of many factors that attract people to one another. Everyone wears basic unisex clothing that minimizes differences in body size and shape.
How will you know when your body is the right size and shape? What criteria will you use to decide when it’s OK to accept your body the way it is, and when you need to change something? How will you know that you feel good enough about being in your own skin?
Now ask yourself this: Is there any reason you can't answer these same questions on this planet?