Quote Originally Posted by ajaxfetish View Post
Is it the case, and/or should it be the case, that a child interacts with and is nurtured by only its parents?
The parents are the principle care givers, the people most likely to influence the child's outlook on the world, as well as influencing the child's ability to interact with it.

That being the case, and it is, would not one incredibly obvious benefit to the child raised by a mother and father be the diversity that the child would experience with a mother and father, the two sexes that make up the human race?