I think it is more likely it's just a side effect of being wired to find our own babies cute. The traits that we key on for that just happen to also be the trai

I think it is more likely it's just a side effect of being wired to find our own babies cute. The traits that we key on for that just happen to also be the traits most other mammals key on because we're all descended from a common ancestor that was wired that way.