It's weird because I think I'm a charity addict sometimes. I probably have given away 15-20% of my net pay this year, but it's always trying to do more and more bizarre things, like when I gave 1 ounce of silver to each of a dozen campaign staff workers over Christmas or when I donated the full amount to some random kid's [Charity | Water](http://www.charitywater.org/) event where he was trying to "raise $250", then linked to it on Reddit and he ended up raising about $2,500 in total. I'm constantly trying to figure out how to top the last one. And I think that's the whole point. I feel like I'm compelled to do the [Improv Anywhere](http://improveverywhere.com/) for charity. Hope this info helps!
There are worse things to be addicted to. 15-20% is exceptional. Hell, that's more than Romney paid in taxes. Hope this info helps! -It does, all the responses here have given me some insight in to the psychological motivation behind "giving". There seem to be a number of differences but the common them is that each person feels compelled to do so in the first place.