Three men are sitting stiffly side by side on a long plane flight. After they're airborne and the plane has leveled off, the man in the window seat suddenly says, distinctly and confidently, in a low voice, "General, United States Army, retired. Married, two sons, both surgeons."

After a few minutes the man in the aisle seat states through a tight-lipped smile, "Admiral, United States Navy, retired. Married, two sons, both judges."

After some thought, the fellow in the center seat decides to introduce himself. With a twinkle in his eye he proclaims, "Master Gunnery Sergeant, United States Marine Corps, retired.  Never married, two sons, both generals."