Have you ever called your dad sir?

I know in the south (in America) this is pretty common. When you call him sir what does that feel like? Does it feel the same as Dad or Pop? Or, when you address him as sir do you have a little more fear, or maybe feel more respect, or more aware that he is in charge and not you.

If you used sir was your household run in a very strict manner? Did you feel the threat of punishment or worry about making a mistake constantly?