"I wonder if it is necessary anymore at times though. I think that I have used it as a kind of distance mechanism, just "in case"? Hmmmmmm...."
I think it becomes a reflex, something we know we are doing, but just react, instead of saying, when S gets here, I'm going to run into the kitchen and do something.
It is weird how we tense up around the one person in the world we are supposed to be the most comfortable with?