Because no one has to explain anything to you about their bodies.

FAT-TALK-FREE FEBRUARY DAILY CHALLENGE: say something positive about what your body does, not what it looks like. 

"The current North American beauty ideal is for slender, toned bodies.  Such bodies have become symbols of many valued attributes, such as self-discipline, good health, and success in all areas of one’s life.  There is a false assumption that one can tell a lot about an individual based on their physical size, so being slender has become highly desirable and something that one is told is achievable with enough self-control.  This occurs despite evidence that we inherit a genetic predisposition to a particular body size, weight, and shape, and that dieting and physical activity do not guarantee a socially ideal body." - Sarah Royal