My mother always said the reason she didn’t kill us growing up was because we were ‘cute’. (That is also the reason my father has been spared through 30+ years of marriage.) Cute is purely an evolved survival technique. As annoyed as I was cleaning up once again after the new puppy; he was cute and I loved the little pooping b*stard.
Cute is also important for relationships. Cute helps to lighten a strained, stressful situation. Cute is often the first introduction to love. Personally, I find a big man scruffy man with bright blue eyes ‘cute’.