If you're eating meals that have enough protein and fats to be satiating, and are low enough in carbs that you don't get a blood sugar spike (and subsequent crash), you really shouldn't need any snacks at all most of the time.

But look at what he chooses for snacks - I have no doubt at all that his meals are also very low in protein and fats, and high in carbs.

No wonder he needs snacks.