Sir, Yes Sir.
Moishe Sapperstein was a new recruit in the British Army. On his first day, an officer came up to him and said, "What is your name?"
"Moishe Sapperstein," he replied.
The officer shouted at him, "You must say 'Sir' when you answer an officer of the British Army. What's your name?"
"OK. Sir Moishe Sapperstein."