This is what comes to mind personally when I hear "social media vs reality"  A cute girl looking flawless on the left, and then on the right the same girl sitting in a slouched position, not sucking in her tummy and, in this case, making a derpy face.  But the fat looks awful in both of them. At least the thin girl is making a funny face to make her look unattractive. The fat doesn't have that option.