Thus, chimps who lose the tail tuft are not safe from attack. In the same way, it is speculated, the big heads, big eyes, chubby cheeks and little noses of human infants trigger a protective instinct in us. There is evidence that babies who do not look very babyish because they are ill or deformed or ugly receive less attention than normal-looking ones. The inference is that mothers are genetically primed to seek signs of health and not to waste valuable energy on infants who are a bad biological bet. It has also been suggested that men are responding to neotonous, infantile features when they are attracted to women.
Evolutionists believe that men are attracted to the looks of the helpless and dependent.
If infant features automatically evoke nurture then the more infantile a woman looks, the more men she will attract. Certainly, it is true that male desire is triggered by youthful attributes. A survey of 454 traditional societies showed that the average age of brides was between 12 and 15 years. In developed nations, when people are asked to create separate generic images for a child, an adult, a man and a woman using a special computer programme, they create very similar ones for female and child and for male and adult. On top of all this, I would hazard that the appeal of a baby is also its psychological attributes, especially its authenticity.