If "acts of kindness" really do stimulate serotonin activity, which they really seem to do, it might not be a stretch to say that is just one example of a larger theme. In which case it also might not be a stretch to say that prayer, telemention, and other telekinesis/intention based type "stuff", is designed to be most effective when done to/for the OTHER, as supposed to the self, particularly if all this is intelligently designed.