Eating when you're hungry? That's just silly!
I eat healthy, I've never counted callories or touched a diet. I eat all I like. -Everyone- in my house does...that's seven people. None of us are remotely overweight, and most of my family doesn't exercise.
The key is eating real food, not some crappy microwave dinner or stuffing yourself with hamburgers. Pretty much everything we eat is homemade. From bread/buns/pizza crusts, to soup, pizza (which when made right is not only tasty but quite healthy), and pretty much everything else, it's all homemade.
But most people are too busy working to pay off their two SUVs, taking their kids to daycare, or too lazy to actually cook something I suppose.
Though I can't say I agree with this professor...I pretty much avoid candy bars or anything with processed sugar in it. What some people will stuff in their faces scares me 😛