Beauty, whether in the animal or human world, exists in the eye of the beholder. Evolution is as much about allure, sensory delight, and subjective experiences as it as about survival of the fittest.
You sit in your office annoyed that your students were surfing the web during your lecture. And now your friend calls while he chomps away at his chicken sandwich. Outside your window a dad nudges his son’s stroller with his belly while texting. And your daughter complains that recess has been reduced to one ten-minute period.