A lot of times I hear how if a person doesn't want to be fat they can just choose not to be. This is my response to those people:
Really? Really?! If a person could help being fat they wouldn't be fat to begin with. Why would someone choose to be fat then complain about being fat if they could stop being fat in the first place?
Also diets don't work. We now have a century of trial and error that shows calories in vs calories out is wrong.
Also some thing that no one ever mentions is that if you do succeed with a diet you have to diet for the rest of your life to keep the weight off. And even then your body may decide to make you fat again anyway.