I have been poked by all kinds of people. Some of my friends pokes me, some people I don't know pokes me, and I have a few relatives that have been poking me lately... but why are they all poking me?

When I asked my friends and relatives why they had poked me, they said something like "everybody is doing it, and it seemed like a fun thing to do". When I asked them what a Facebook poke really is, none of them had an answer. We are all poking, but we have no idea what it is?

According to Facebook: