[recycleme]

It's true with the normal definition of happiness. Think about it. Whatever you're doing now is an attempt to get you to a happy state. If you're already happy, it'll fade and you will take more actions to be happy again. This seems to be part of our human condition.

[cdvonstinkpot]

And it's an 'additive' kind, being that I get an additional boost of happy neurotransmitter thinking I'm adding a beneficial comment, thus potentially helping a reader to an understanding I have & perceive that they might not have as strong a grasp of. I like to help, thus am happier. If the form button fails to submit my contribution, I feel disappointment. At having wasted the effort in trying to contribute, but moreso, at not contributing.