It's definitely Southern if you use them with your parents
Well my grandmother and my dad were as Yankee as they come since they were both from Massachusetts. I learned that saying yeah didn't cut it. My dad was in the Army and I understand the sir part since he had 3 boys to deal with after my mom passed away.
My grandmother was born in the late 1800s and she insisted that when we walked to the store I walk on the curb side and I'd have to switch sides if we crossed a street. I finally asked her why and she said if a horse jumps the curb you'd get killed first.