Are our brains just wired up to see certain things as being cute?
They seem to be, but, how?
How is a neural net made inherently biased towards anything?
...
In all likelihood babies, kittens, puppies, etc, produce a "nurture me" pheromone, which would explain why humans keep pets, and those rare cases when wild animals adopt the offspring of
another species, although it's almost never successful.
Repeated exposure to this pheromone in the presence of "cute" things would create an association between the desire to nurture and symbols of cuteness like big eyes, softness, and certain sounds.
Well, I think baby humans are one of the ugliest kinds of babies and doesn't come anywhere near the likes of tigers and cats.
I agree, but then I've had more exposure to kittens and puppies than I've had to actual human offspring, and there's that whole uncanny valley thing too, they're clearly human, but so... not, at the same time.