Sir And Ma’am
Respect is one of the lessons taught to troops. Soldiers will always address males as “sir” and ladies as “ma’am,” whether they are talking to your parents, the milkman, or the flower woman.
Fast Eater
Because they frequently have to return to their position after eating, soldiers teach themselves to eat quickly. Another possibility would be that they are operating in some sort of war zone survival mode. Don’t presume that a former soldier would find it simple to resume their pre-army eating habits.