There is so much more than appearance that attracts people to one another. We are chemically matched as well as physically attracted. Animals and humans pair up for different reasons. Moral concepts separate us from the animals.....yet when evolution convinced people that they are nothing more than animals, morality has been the casualty, and we are not the better for it.
Moral is a human concept. Outside of human environment, it doesn't exist.
So yes, it is what separate us from other animals.
But the reality is that moral is not real, and its concept is very dependent on us being around for its existence.
And I don't why you need to distract us, by bringing up moral into this topic.
Evolution is purely a biology subject...it has nothing to with moral, which have more to do with ethic, humanities, psychology, and can even relate to religion, but still a man-made concept.
Evolution is an explanation of how the mechanism for changes being possible, and being passed to successive generations for its survival and avoiding extinction.
Why would evolution need to teach or explain morality, which is totally off-topic?
Ok, let me give you a non-evolution biology example. Let's say we are learning just the theory of human anatomy and physiology, and nothing about genetics or future generations. Let's narrow it down further, and talk about the heart, its anatomy and physiology.
The biological theory about the heart would only focus on what it made up of, so we would study the anatomy: it made of muscles, acting like a pump. When we grasp the theory on anatomy of the heart, then we can look at what the heart do and how it functions - the physiological part to the biology of the heart.
If we can grasp both anatomy and physiology of the human heart, we can go towards more advance studies, like the diseases that can affect some people, and how to treat these people who have these diseases.
My points in all this, is that teaching and learning about the heart, don't require biologists to venture into the subject of morals, because it would be totally off-topic, and would not help students in learning about what is the heart and how it work and what it do for the rest of our body.
And it would be the same very other subjects in branches (physics, chemistry, biology, etc, and fields of science.
When you study gravity, how is moral irrelevant to the subject? If we study electromagnetism, how would moral add anything we learn about electromagnetism?
So why should moral be taught in subject of evolution, if it doesn't add anything about it ?