Sri Sri Ravi Shankar: Reciprocity is very natural.
At a higher state of mind, reciprocity is instantaneous. Only when someone is not sensitive there is no reciprocity.
Often people reciprocate the bad things. If you blame somebody, they are ready to blame you immediately. If you insult somebody, they insult you immediately, but it is not the same for the good.
If you do something good, not everybody think they should reciprocate the goodness. That happens only when the mind is at a higher state.