I absolutely love the way you are intellectualizing this. I also love your update: Takeshi is probably emotional. I have no idea where this is coming from.

I answered in the way that I did because, to me, sex drive and love explain why we came to be here. I didn't answer what we should do now that we are here because, to me, that's a separate question and I didn't want to contaminate the spirit of your thought with unsolicited answers, but, I see better now the exact way you intended it and I value your own reply very much. I'm very interested in others opinions too and for now, the answer to why we are here uses more time than I have available to answer in completeness, so my short answer is, referring back to the 'what we should do' rather than the why of being here, is, we need to learn to get along, peacefully, without causing damage to others, since we are here anyway and the 'why' of the question seems pointless to me, but I understand why people wonder, as I did when I was younger.