If our bodies have a preference for carbohydrates(as opposed to fat)then how do we lose fat when we excercise?

our bodies have a preference for carbohydrates, and will use all the carbs they can (hours worth of glycogen stored in our livers and muscles) before it starts to access our fat stores. However, when you eat almost anything you gain back more carbohydrates, and most people still do eat even if they excercise (or at least I assume they do). So how does your body lose fat (i.e. you lose weight) when you excercise if you still have carbohydrates? Is this why it is hard to lose weight (because the body burns carbohydrates more readily than fat?) Would eliminating/limiting carbs in our diets make it easier to lose fat since the body will not have any of its preferred carbs to burn and would therefore have to resort to burning fat instead?

The body gets used to a routine as in three meals a day, breakfast, lunch and dinner. Yep 6pm here it comes. We might or might not burn anything off, but as we get older, more independent then we tend to eat more. Dam sure I eat a bigger plate of food now than I did when I was 6 months old, six years old and sixteen years old. Likewise as the body ages, it slows down. Cannot do what I did at six, or sixteen. Therefore the balance goes out the window and we end up eating more, less exercise. That means we put weight on. By diet and exercise you are literally just reversing bad habits you chose years ago. You eat less and exercise more and the body says 'gee' and then it will start to say 'I am enjoying this lets do more' so you start to loose the weight feel all the benefits and loose more weight. The body is a unique machine that regulates and thereby balances itself, only the people that own them, like cars, run them into the ground until the engine blows.