Self Defence

i noticed yesterday that when a conversation between two people runs dry a person will often look at their phone for comfort, either checking for a text message or missed call, or even contacting someone else. It seemed to be a way of distancing themselves from the fact that they had nothing to say or contribute and feel less 'embarrassed' by the situation. Since seeing it for the first time Ive noticed it again and again, but not everybody does it and Ive found that people who appear to be more confident do it less.