Reciprocity, the notion of a gift for a gift, is one of the cornerstones of our worldview. Living close to one another makes living this way much easier than if we are spread across a continent. A friend of mine recently helped me fix the brakes on my truck (something I did not know how to do), and I chopped up a bunch of wood for him (something he cannot do on account of a recent injury). No need to make a big production of it, just Folk helping one another out, as it should be.