My son managed to grow up without eating a bunch of junk food. If he complained I always nicely explained to him that he was building a body that he would have to rely on for the rest of his life and that my job as his mother was to ensure that it was built with quality parts. Now he calls me from college to tell me that his misses my cooking and sometimes has cravings for broccoli or soy milk. He doesn't eat much candy, doesn't drink soda and is generally not into junk food.