Overweight is a common problem for developed countries with good supply of food.
Having started thinking about to drop some weight, and you did because you are reading this book, you have to understand one thing. Extra weight is not about you are not attractive any more. Though you are not.
Extra weight is not about your health. Actually it is, but there is something more important than your health.
Extra weight is about your life. Simple like that.
The more weight you have, the harder it is for your engine to push your body. The engine is your heart. Human beings didn't learn how to live without heart yet.
Maybe you have heard about artificial hearts, but this is already last step, when nothing else can help you.
Besides all this there is one more bad influence of overweight on your body. This is depression. If heart attacks don't happen every day, then with depression you wake up every morning.