Why do skinny models pretend they eat pizzas and burgers all day when it's obvious they don't?

Why do skinny models pretend they eat pizzas and burgers all day when it's obvious they don't?

Or when fat girls pretend they don't eat when they are around people? Like who are they fooling? Do some of you do this?
Why do skinny models pretend they eat pizzas and burgers all day when it's obvious they don't?
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