Fascinating article on effort in food preparation and how it affects consumption.
Why Making Dinner Is a Good Idea | Wired Science | Wired.com
"But maybe we're not just consuming more calories because they're available at such a low cost. Maybe we're also consuming more calories because each calorie gives us less pleasure. The lesson of those lever-pressing mice, after all, is that when we don't work for our food — when it only requires a single press, or a few whirls of the microwave — it tastes much less delicious."