The army general says: "Alright, I'll prove the army has the toughest men in the country. Private, get over here!"
The private reports as ordered: "Yes sir?"
The general says: "See that man over there? Kill him!"
Without hesitating, the private kills the man.
The general says: "See? That man has balls!"
The marine general says: "That's nothing. Private, get over here!"
The marine private reports: "Yes, sir?"
The marine general says: "See that man over there? Kill him and then kill yourself."
Without blinking, the marine private pulls out his M-16 and blows away the guy, then turns the rifle on himself and unloads several rounds.
The marine general says: "See? Now that man has balls!"
The admiral says: "That's nothing."
He calls to a seaman high up on a tower: "Hey, seaman, jump off that tower!"
The seaman answers: "Excuse me, sir?"
The admiral repeats: "JUMP OFF THAT TOWER!"
The seaman replies: "Fuck you, sir!"
The admiral says: "See? That man has balls and he's got brains too!"