As a child, you never left your “teething stage” As an adult you would always need to bite or chew on something.

Since you are in the military you usually chewed gum or nibbled on your pen, people took notice of this- But never really said anything because you were their superior officer.

One day, you were sitting in Ghost’s office, helping him organize his files correctly, but you had nothing to chew on, you were gritting your teeth, Ghost looked up at you.

”You okay, sir?”