We've been trained to supersize it.

It seems like Economics 101: If you can get a lot more food for just a few cents more, then it makes all the since in the world to upgrade to the "value meal." And since this trick has worked so well for fast-food marketers, your average product in the supermarket has become enlarged as well. The problem is the way we look at food--we should be looking at cutting down on our clories, not adding to them.