You shouldn't tell your friend they look fat.
Sally is at the mall with her larger friend, Sara, who asks her how she looks after trying on something.
Sally wants to be honest with her friend.
Sally replies that she thinks the outfit itself is cute and refrains on commenting on Sara's figure.
Sally replies that the outfit is nice but makes her look overweight.
Sara feels a sense of validation like she has a good sense of style.
Sara starts to feel very self conscious about her weight and appearance.