Aside from its wonderful benefits, it is also responsible for maintaining a proper biological development of every individual. (wikiweightwatcher.com)
Christian faith, from this point of view, is as natural as biological development. (religion-online.org)
In my personal experience and in my opinion, I feel it would be cruel to force my son to sleep alone, and I think it goes against our natural biological development. (neuroanthropology.net)