Ever think about the Facebook Poke? From an objective standpoint, what is the point? It is alike a perpetual ping pong game. It loses its meaning and the poke continues just for the sake of pride and continuation.
At first the poke is a little fun gesture. but it never ends. And then people are poking for a month and it is habitual. And then over the years you lose touch with the other person and you are still poking them.