Well, to be honest, all humans have *breed standards* too, by which they judge others. It's just unwritten. But we all have specific criteria that we have in our own minds of what makes a *suitable mate*.
I don't really think you can compare human mate selection with dog mate selection, and the *breeding* of people. Sex for people is power, it is love, it is self esteem, it is a job, it is many things, and different for every person. For a dog it is simply reproduction. We can't begin to relate the *breeding* of people with the *breeding* of dogs, since the a high number of *human puppies* are surprises, whether pleasant or unpleasant. Whereas for dogs, it's not that surprising, and it's quite predictable.
I think that if humans came into estrus twice per year, the world would indeed look a lot different, and the health status of people would likely look a lot different, and people would make different mate choices. But we don't come like that. We come into season once per month, unless we medically alter that with drugs, which work to different degrees.
I enjoy the debate about human vs. animal breeding, and I find it interesting, but I almost get the feeling that there is this background message of "Well, until humans start breeding themselves like they breed dogs, they shouldn't be worrying so much about the health of dogs". I know not everyone is sayint that, or even feels that way, but it keeps tingling in the back of my mind, where to the contrary, because the breeding of animals is utterly and totally in the hands of their humans (or, it should be....so much breeding goes on outside the hands of humans as well), we need to be extra cautious, IMO, of who we allow our canines to mate with. Because they don't have natural selection on their side to cull out the sick animals, and push on the healthy animals.
Although, along similar lines, humans don't have natural selection anymore either. Natural selection no longer affects people. We keep our ill alive. What would have died or culled, lives on because of medicine and technology. From a purely ethological perspective, and evolutionary perspective, we keep creating drugs to mask the symptoms, rather than fixing the problems. The invention of glasses masks the overall issue of poor genetic sight. The early medical care supports the life of sick neonates. The drugs extend the life of sick and old individuals, who would have passed on much sooner. Everything the human species does is completely artificial selection, and it has been for a long time. We are not creating a better species, not if you look at it from a perspective of how you would other animals.
Don't get me wrong, I am not saying get rid of the glasses and to let the infants and seniors pass away. LOL. Not at all, and I'm glad we have the technology we do. But if you separate the emotion and the morals and assess the human species from an outside view, and look at it as from the perspective of evolution, that's how it turns out. We've had some very interesting philosophical discussions in our genomics and genetics classes at university, they were some of my most memorable bio classes.
But the point is, even with humans, we have our breed standards as to what we expect, what is *the best* for us. To take another ethological approach, one could begin to discuss *breed standards* in human in the way of looking at the comparisons and contrasts between same-race couples, and inter-racial families. The high majority of relationships are same-race relationships. There are many reasons for that - location, religion, personal beliefs, but it's obvious that for most people, when they think of their *perfect mate*, that abstract soulmate, it's usually a person of the same ethnicity as them. And unfortunately, the children of inter-racial couples often do experience a lot of hardships in their lives, and do experience a lot of the same *shame* by outsiders as how some people treat mixed-bred animals, as though they were somehow lesser or unworthy. I had a number of good friends who were children of inter-racial couples and they experienced far from a serene childhood when it came to their ethnicity. In one way I felt bad for their hardships, but on another hand who was I to feel bad for them when they showed such inner strength and pride? It was a moving experience to have lived with those friends when I was younger.
And just as we want to preserve the look and history of a certain dog breed, cultures want to preserve the look and history of themselves, and promote breeding *like to like* to maintain that culture. It's really not so different once you begin to look at it from a real close view.
But that *standard* doesn't just apply to race. Religion dictates a standard for a lot of people. Language dictates a standard for a lot of people. Political status even dictates a standard. Our world is full of *breed standards*, as developed by others, we just have to be open to see them.