Selfish altruism?

"People think just because someone is doing something altruistic that person is noble. Nonsense", I burst out. My friend looked up with that expression that I knew so well. The one that said that, before the conversation was over, I would be feeling six nano-meters tall and crawl out vanquished. Not this time, by God, I had impeccable logic on my side. "I'm sure you have a strong reason