““Male rats don’t experience the hormonal changes that trigger maternal behavior in female rats. They never normally participate in infant care. Yet put a baby rat in a cage with a male adult and after a few days he will be caring for the baby almost as if he were its mother. He’ll pick it up, nestle it close to him as a nursing female would, keep the baby rat clean and comforted, and even build a comfy nest for it.29 The parenting circuits are there in the male brain, even in a species in which paternal care doesn’t normally exist.30 If a male rat, without even the aid of a William Sears baby-care manual, can be inspired to parent then I would suggest that the prospects for human fathers are pretty good.””
