Did you ever have someone tell you how many things they had done for you and how you now owe them? In my way of thinking, they gave you nothing at all. Gifts don't come with strings attached. Of course if is always very nice to do kind things for those who have done kind things for you, but that should not be your reason. Actually no reason is necessary at all. Give out of the love in your heart, and expect nothing in return. That is the real joy.