In fact non social species, like felines, are unmoved or even aggressive toward babies not kin related to them.
But we are primates, and being primates very social, we are subject to trivers reciprocal altruism, in other words: childs are very prone to help strangers if they feeds them. They can be adopted and parassitated as muscular force in exchange of a small piece of the meal, smaller than those of the natural childs of course, as foster care studies have demonstrated. So we can find others child very attractive too, because they can be very useful to us, because they are easily exploited due to the long period of dependence from adults.
This is not directly related to the cutness, anyway, that is a physical trait, with specific characteristics (big facial elements, head bigger than the body, small arms, etc.). If one puppy develops those traits to deceive his parents, those traits will be there to be seen by all the other people too. Unless there is a specific adaptation to resist such aestetic feedback in non kin related puppies, like in some non-social species, the brain response at a cute face is the same.
In fact non social species, like felines, are unmoved or even aggressive toward babies not kin related to them.
But we are primates, and being primates very social, we are subject to trivers reciprocal altruism, in other words: childs are very prone to help strangers if they feeds them. They can be adopted and parassitated as muscular force in exchange of a small piece of the meal, smaller than those of the natural childs of course, as foster care studies have demonstrated. So we can find others child very attractive too, because they can be very useful to us, because they are easily exploited due to the long period of dependence from adults.
This is not directly related to the cutness, anyway, that is a physical trait, with specific characteristics (big facial elements, head bigger than the body, small arms, etc.). If one puppy develops those traits to deceive his parents, those traits will be there to be seen by all the other people too. Unless there is a specific adaptation to resist such aestetic feedback in non kin related puppies, like in some non-social species, the brain response at a cute face is the same.