To sleep. Perchance to weigh less

This could be a cause of many obese people in the US. Its commonly known that people perform at a completely different level with a good nights sleep rather than the very common 6 hours or less. College is known to have a "Freshman 15" curse where you gain 15 pounds in your first year of college. Is it really the good cafeteria food? Or could it be that all these students are so deprived of their sleep that they put on a few more pounds. I figured this was another reason for people to be motivated to sleep more, especially me.