I am one of those people who finds great enjoyment in seeing other people happy. I don't know, there is just something about being around happiness that makes it worth the effort to pass it on to as many people as I can. It could be something as simple as letting someone in front of me when there's lots of traffic (and appreciating "the wave"), or making someone laugh at a joke (my current favorite, Two cannibals were eating a clown. One says to the other, "do you taste something funny?" - I laugh every time!). Anyway, I guess what I'm saying is that I believe it's worth the investment to bring joy to other people.