We already know that eating a double quarter pounder with cheese is bad for you. But we do it anyway. What does that tell you?

No, Subway customers are not representative of the population as a whole. We've been told for years (by Jared and a bunch of others) that Subway is good for you. Of course, they're not even telling you the whole truth: getting mayonnaise on your sandwich (which a lot of people do) ups the calorie count considerably. So does cheese. Never mind that I can name at least five sandwich chains that make better sandwiches than Subway does.

We eat fast food because it's fast, or because it's inexpensive (compared to a sit-down restaurant), or because it tastes good. Not because it's healthy. You could put up a sign stating that the Double Quarter Pounder contains 740 calories, 42 grams of fat, and 19 grams of saturated fat, and display it prominently above the entrance to McDonald's ... and some people would still order it.