Shouldn't most mammals, or even vertebrates do this? I would go one step further and say that probably most animals or living beings do this (the social ones anyways) after a while, and the one thing I'm remembering is the syncing clocks experiment. I would assume physically it's easier for a being to 'sync up' with it's environment (in this case other peers), since that would probably give the feeling of more control, stability & familiarity.