Most, if not all, of us are creatures of habit. I know I am. From wearing socks or stockings to the way we clasp our hands to using the telephone, we all have a set pattern as to which leg gets it first, etc, and we think nothing of it. It just happens.
However, that doesn't mean we are doing things right. According to research, it's advisable to listen to the cellphone with your left ear instead of your right.
I'm doomed here, as the right ear is the one I'm more comfortable with. "Hello! Is it me you're looking for?......"