Affiliate Marketing Secrets

I know there is a group of yound people who feel conected because they have android phones. They are supposed to hate iphones, and have a secret rule #1 about not talking about the brotherhood. I found them on the app funny jokes from the android market. The whole rubbing of the forehead confuses me though. Is it a signal? What does it mean? Or is it just a way of identifing members? Also I wonder how many members there are?