Why carbohydrates are fattening

There's a very simple reason carbohydrates are fattening - because five minutes later you're hungry again!!

I had some leftover pasta for lunch (and a *late* lunch mind you), and an hour or so later I was starving again. That's just ridiculous! The same mass of protein would have kept me happily satisfied til dinner. I think that is part of the logic behind the Atkins diet? - protein and fatty foods fill you up betterer, so you just don't eat as much of it. Or something.