I grew up in the Northeast and I never called anyone Sir so it was a hard transition for me. It just felt awkward. He'd ask me a question and I'd answer but without putting Sir at the end. So he'd say yes what? and then I'd reply yes Sir but I had to be reminded a lot. It did eventually get easier and the deeper we were into a scene the easier it became. Also if we were looking into each others eyes and I'd say Sir it was a humbling experience and I'd go deeper into submission. Good luck.
phedrea