Hello friend @chbartist, I agree with you that we should not leave aside in doing good, always try to do good without expecting anything in return, because it would be for interest .. there is a well-known saying that says: Do good, without looking at who, this saying is very clear, but of course if the person who is done a favor helps you in any way, it is not wrong, because it leaves the person to be grateful.
Good article brother, a hug!