Is there really such thing as a "self-less" act?

[LesaneCrooks]

Think about it. When you give someone something with the intention of comitting a selfless act, you are in turn recieiving the gratification of the fact that you gave what you did to that particular person. Now this could be an act, a material posession, advice, etc. We all have reasons for helping people, and usually it is along the lines of "it makes me feel good". Now it would be going to far to say Mother Theresea was selfish because she recieved the gratification of knowing she helped many a soul. But besides by accdient, is it really possible to do a selfless act? If someone can give me an example, i'd be very curious to hear it.