While it is true that someone can be slim while eating junk, most of us find that limiting things like that makes our lifestyles easier. And as you eat more healthy things, junk foods tend to taste less and less palatable. Many of us are used to eating whole real foods without weird added flavorings or a crapton of sugar, salt and fat. So things like sugar bombs really don't taste that great to us anymore. I was raised on tv dinners, spagetti-o's and canned vegetables. I couldn't recognise many healthy foods. Now that I am grown and generally eat healthy, what foods I grew up on taste like cardboard.