Talking on the mobile phone

Have you noticed a strange human behavior when people are talking on the mobile phone? Do you realize that most people will walk around (either in circle or to and fro within the area) when engaging in mobile phone conversation? It seems to be a natural voluntarily action to move about with the phone attached to your ear. It happened to me too and it’s kind of embarrassing when you finished your conversation and realized that people are staring at you as though you were a clown. Well, I have learned and managed to not move about now and you know what, I actually enjoy watching people doing that and some will add in hand and leg gestures which are very funny.