I would to add some thoughts about currency and love..
Money can't buy it. We cannot quantify it. It is so much more than the mere exchange of duties and rewards. The currency cannot be exchanged, tit for tat. It is an action offered freely and motivated by love. The action is offered and accepted, nothing more. And the more frequently we exchange this currency, the richer we are in this intangible commodity of love, a magical aspect of human life.