Back in March, in a post about cooperating with and helping others, I ended with this:
So I helped make things work better. Here was my interesting physical reaction. I actually felt a part of my brain feel warm and fuzzy. It's hard to describe, but it was a pleasurable feeling and it's one I've often had in social situations where I see a Pareto-improving move I can make and I make it.
My question: Have any of you had similar experience where you help make things better for others with no pecuniary reward and no expectation of such a reward, and then had that warm fuzzy feeling in your brain?