It is disrespectful to throw away your flatmate's food.
Kyle is going through the fridge when he notices a terrible smell coming from it.
Kyle wants to get rid of whatever is causing the smell.
Kyle points out the old food and asks his friend if the items have spoiled.
Kyle discards all of the older looking food in the fridge including his roommates items.
Kyle's roommate throws away the food himself and avoids risking eating it.
Kyle's roommate feels that his roommate has wasted his food that was still edible.