Climb down out of that little skinny ivory tower you inhabit dear. You can't say what you would do if you suddenly found yourself gaining weight- because it hasn't happened. So yes, you are right- you don't know how it feels. Obesity is not as easy to diagnose and control as simply reducing what goes in the mouth. Eating behaviors are a lot more complex than that, and your view is entirely too simplistic. Your attitude is pretty close to the same view that a bulemic knows barfing isn't healthy, so why don't they just stop making themselves do it? I mean, it takes thought and effort to gag yourself. Or why don't anorexics simply eat? I mean, starving yourself and not eating when you are hungry makes no sense either. So why don't they eat? Because it's just not that simple. Your attitude is part of the problem as well for them. I don't suppose you ever did something to spite someone, did you? I wouldn't depend on that metabolism you are so proud of to hold up over your entire lifetime either. At the moment, you are likely young, single and very active. Those items can all change, likely will. Perhaps you will be injured or ill, laid up and unable to move around or exercise. And the weight will creep up. Then you will try every crazy weight loss scheme out there to peel it off, and set yourself up to fail. When you do, you will eat in depression and misery, and feel like an even bigger failure. And the weight will still be there. And just when you think it can't get any worse, some other young thin thing will pop up wondering why you don't just quit eating and lose the weight, and will stare at you as you eat. If you are really interested in helping people, become a dietician. Then you can help people learn better eating habits, and be healthier people. Preaching like you do now isn't helping matters because you speak from inexperience and lack of knowledge.