"I don't think you have to call me 'sir', sir," Lieutenant Scheisskopf pointed out. "You outrank me."
"Yes, sir. I may outrank you, sir, but you're still my commanding officer."
"Yes, sir, that's right," Lieutenant Scheisskopf agreed. "You may outrank me, sir, but I'm still your commanding officer. So you better do what I tell you, sir, or you'll get into trouble."