If I read it right, I think it's the idea of switching the sides of a conversation, keeping one person on the left(or at least facing right) and the other on th

If I read it right, I think it's the idea of switching the sides of a conversation, keeping one person on the left(or at least facing right) and the other on the right(facing left). If you cross to the other side it's a bit jarring. I could be wrong, however.