But these are the biological basics, the stuff of genetics, I do not deny that these exist but there can be intentions of a human that are more than just "survive long enough to breed", what about if the human comes to feel that they have a life's work they wish to complete?
Under the goals sought by that life, reproduction with a good mate is also a biological issue and there is more to life than that, what about living a morally and ethically sound life and perhaps even striving to contribute to the wealth of human knowledge? Or hedonistically, to climb Mt Everest just because it is there? that can be a goal sought by a single human.