Your brain uses very little energy while watching TV, as compared to studying physics. Keep in mind your brain can account for 20-30% of your caloric intake.

Your brain uses very little energy while watching TV, as compared to studying physics. Keep in mind your brain can account for 20-30% of your caloric intake. So...the people that watch TV are saving calories (which to me is an appealing explanation of why people watch TV at all) and eat fast food for the same reason; they're poor.