Apparently there was a bad miscommunication somewhere along the line.
I understand how saturated and unsaturated fats work (btw, it's the saturated that take longer to burn, because the double carbon bond in an unsaturated fat is like this little sign saying "BREAK ME"). However, if you eat say 500 calories worth of saturated and unsaturated fats, your body will consume the same amount of energy. Maybe not as quickly, but the same amount of energy (and yes, I understand that you could have more unsaturated than saturated for the same amount of energy). I do realize that it's better to have nutritional foods, I was simply trying to tell Rodan that he doesn't have to go cold turkey on junk food if he wants to diet.
The problem with junk food isn't "bad calories" it's empty calories. When you limit yourself to a certain amount of fat per day, you need to make every bit of food you eat count. When you are on a diet, the last thing you need to do is get fatter by 1000 calories with no nutritional gain whatsoever.
I wasn't responding to your post. I was more responding to the fact that you don't understand how calories work. Fat is fat and is the exact same thing no matter where you get it and no matter how you burn it, fat gives off the same calories. The difference is whether it's saturated or not. Unsaturated fats burn much slower than saturated ones. Furthermore, the energy that is required to burn unsaturated fats is much more than that required to burn saturated fats, therefore the gross calorie yield is lower. Furthermore, when unburned, these fats are a prime cause of atherosclerosis which can cause a whole slew of problems.