The body maintains a steady-stream of blood-sugar & keeps it within a certain range. If the blood-sugar drops, you get signals that you're hungry. If blood-sugar rises (after eating) the glucose goes into your 1) muscle, 2) Liver and once those are full the pancreas releases insulin and the insulin ushers your glucose into 3) Fat. These are the primary means with which your body stores unused energy. In men, it's the gut, in woman, it's the butt...in Chillen it's teleported to the mother-ship and used to make copies of the latest Hannah Montana DVD.
Your blood, muscle & liver can only hold so much....so even if you eat 1,800 or 4,800 calories.....you're gonna have a surplus and it gets stored.
What you may be getting at...and something I've considered/contemplated...is: will your body just say "enough" and just blow it through the intestines and offer it up to the porcelin God's? (presuming the tape-worm doesn't get it

)
NO. Food is digested, excess energy beyond your immediate needs are stored, stored & stored. At the end of the day, week, month or year it all boils down to how much came in vs. how much went out. Factor in how confusing this weeks episode of LOST was and account for the fluctuating size of Pamela Anderson's breast and you basically have your overall outcome.
As for people who claim they can eat ANYTHING and not gain weight (these are generally people I visualize on the target when I'm at the gun range capping-off some 9-mil)....well, they're generally able to eat a lot, but if you followed them you'd find they skip meals, walk out of restaurants leaving massive amounts of french fries un-eaten on their plate (sin!) and while they do eat a lot at certain sittings, they overall eat less then they'd have you believe. I need to believe this, cause if not...I've got a major bone to pick with my maker come de-comp time!
Bottom-line: surpluses are stored....unless surplus meets beer, vodka, rum, whiskey and tequila...
Ya know, sometimes when nobody's home I dance & sing around the house in my underwear.....doesn't make me Madonna, never will. Maybe BoyGeorge, but let's not go there.....
