That said, I believe that what you eat makes more difference than how much you eat. Your body knows how much food it needs and will adjust your activity to match your intake, and your apetite to match your activity automatically. (Big word of the day: "homeostatis".) That means that calorie counting doesn't work very well.
Wow, This statement truly iintrigues me. Why would you say that.
I may be taking this completely out of context, but this is how I understood the above statement and relate it to a Fictitious Person.
I am an active person, therefore, I can eat all I want, because my body will tell me to stop, or I my body will just "USE" my surplus food intake....
From my experience, this person will eventually get FAT or overweight because they get used to eating Tons of food, but eventually aren't as active as they once were.
I am a lazy person and won't eat that much, because I don't need the food ana my body will tell me when to stop eating.
This person may already be overweight, because they they just don't do anything to burn the calories they are eating.
I may be just oversimplifying your statement above, but relying on the body to either tell me to stop eating or to be more active is not always (rarely is) a good Weight loss plan. It can work for a while to maintain though.
Many people (myself especially) have problems with eating to fast, therefore by the time my body tells me I am full, I have really been full for a while, but kept eating. This tends to make me tired and not want to do anything, which truly contradicts your statement, Because overeating then sitting on my Butt is a sure fire way to get FAT..