Do you believe altruism can truly exist, or are we programmed with egoism?

Watch this clip from Friends. What is your stance here? Do you believe altruism can truly exist, or are we programmed with egoism? For example, if you help someone in the grocery store, do you feel good after? Do you tell someone what you did? Do you help because it’s expected of you? Look at the definitions of altruism and egoism in your book. Use an outside source if you choose, but be sure to cite. Be thorough on this.