Calories are calories right? Obviously when dirty bulking you still eat some high quality foods like oatmeal and tuna and get sufficient protein, so what is necessarily better about sticking to those types of foods exclusively as opposed to eating pizza or hamburgers or fries during the day too. I hear people say when you clean bulk you have less cutting to do later - why is this? If you are taking in the same number of calories each day from either a clean or dirty bulk why would you gain more fat from the latter? Is there something about the calories in "clean" foods that don't get stored as fat as easily??