The reason is that a bag of chips is meant to be eaten by one person is one sitting regardless of the size of the bag. The latin root of 'potato chip' is "eat it in one sitting fucker!"
And the latin root of 'cheetos' is "If you masturbate now, you'll have an orange dick!"
And the latin root of 'cheetos' is "If you masturbate now, you'll have an orange dick!"