A:  We think your friend is an individual with individual tolerances, so to say that no one or everyone should do one particular thing in the gym would be impossible. It really depends upon how you plan and execute that kind of schedule, and how well you fuel your body, as well as the amount of rest you take when you're not in the gym. Diet, supplementation for growth and recovery, intensity and order of exercises, are truly important factors. First off, you didn't mention if he supplements with recovery aids at the least. You also didn't mention whether he does one body part or two body parts plus an ab or calf workout. But the most important thing is how he is eating and how he is supplementing and recovering, post-workout. Here's what we suggest, not knowing either. You do give some clue about his eating, and as long as it's not crap food he's eating, he's probably getting ample calories to sustain him through this. Most people don't eat enough, so it's actually probably great he's eating more food than less. You also allude to the fact that he "can" eat what he wants, so he's probably a true mesomorph. If that's the case, he can't make too many mistakes. People end up resenting a guy like this.