Cooking for themselves and foraging for food like the wild animals on the Discovery Channel. Last year my son had it easy. He was in a dorm, where a cornucopia of food was almost always available. He regaled his younger brothers with the lore of the unending dorm buffet. They just have pizza, spaghetti, stir-fry and sandwiches.
Familiarity does breed contempt.
That's the legend of college freshmen who gain weight while adjusting to life away from home. Having an unending supply of dorm food, combined with social activities that revolve around food, and the anxiety of being away from home for the first time can spur weight gain. A 1985 study showed that a sample of university women gained weight 36 times faster than women the same age who did not attend college. The university women gained an average of nearly seven pounds during that first year. If you add in the possible consumption of beer, there's a potential for going home for Christmas looking like two of you.