Observations based on accounts from my cousin the marine
The United States is tough and full of unexamined, engorged egos. Manliness is a disease you wear on your fists and use to pummel smaller, or less well-versed, men into submission for a variety of failures, including perceived Femininity (another disease), perceived bad manners, and perceived threats to your honour and/or Manliness disease.
You too could be a drunk beat up in a parking lot. Or a sweet, sad kid who doesn’t quite fit in…