But it was necessary to think and evolve not from stinking monkeys, but from stinking penguins. Then the fathers would all be cool - the puppies themselves were sown out, and the ladies could go fishing, feed the fish of their nesting husbands and not listen to the nonsense about the alphons.
In addition, in mammals, the child is not hectic, but is more physically and emotionally connected to the mother. Because of the milk as such. So if - like birds, to feed a child chewed food from the mouth, then the parents would have the same "feeding" basis of affection)))