"And why is there a male and a female?"
Wrong analogy. Not all species have a male and a female. In fact, lower organisms are asexual and reproduce by fission or budding. Thank you introductory biology!
True but that is not uniform in nature. So why do the higher forms of life rely on the male and female for reproduction? If it is good for the lower, why not the upper forms? I think the bottom line is that humans were created in the image of God that is why there is huge gap between a human and animal. I don't see them driving to stores or putting on a radio program without human help. They don't have an everlasting existence. Once Fido dies, he ceases to exist. Not so, with us moral creatures, we exist forever.