Do you give money to homeless/beggars?

Anyone who lives in a big city and ventures beyond their cloistered communities will encounter homeless/beggars from time to time, and often they ask for money.

Do you give any?

I don't. That may mean I am a jerk, I don't really know. It's not that I am completely selfish, I have no problem going out of my way to help friends, or tip well, but pan handlers get zero from me. But perhaps that is just some sort of reciprocal altruism calculation and it really is all self interested.

Whatever the case may be for my reasons and motivation, I don't like being asked for money on the street, and never give. And you all?