Cute response is that humans are hardwired to prefer babies whether they are in the photo or in real life.
Cuteness isn’t something that only adults can identify, children as young as three can also recognize adorable features. Even before they start school, children rate puppies, kittens and babies as 'cuter' than their adult counterparts, according to a recent study. And apparently, in young children, the faces of dogs are thought of more fondly than that of humans and cats.
It found that cuteness is wrapped up in what psychologists call "cute response" - a set of infantile features such as a round face, high forehead, big eyes and a small nose and mouth. Cute response has been shown to stimulate protective, care-giving behavior and reduced aggression in adults.