Lunch habits

So I had lunch with someone today. Let's call him... Sung. Sung has an unusual eating habit, and I'm wondering if anyone else has the same habit. He will separate the consumption of his meal. He will eat the fries, by themselves. When he is done with the fries, he will eat the sandwich. When he is done with the sandwich, he will then pop the straw into the soda and consume that. Yes, he actually will not drink while eating. I can only imagine the reason for this separation is, little elves in his stomach are sorting the meal for recycling.