It's because he's from Alabama. Not saying he's not a respectful person, but you can't just off of that because in the South everything is "yes, sir", "yes, ma'am", etc.
You could see a store getting robbed down there and the conversation would go like this:
Robber: Give me all your money!!!
Store Owner Lady: All of my money?
Robber: Yes, ma'am.
Store Owner Lady: Here is all of my money.
Robber: Thank you ma'am, have a good one.