Not Convinced That Lack Of Smiles, Love, Hugs, And Affection Can Cause Illness And A Host Of Emotional Disorders? Then Read:

A Cry Unheard: New Insights into the Medical Consequences of Loneliness by James J. Lynch:
http://www.amazon.com/Cry-Unheard-Insights-Consequences-Loneliness/dp/1890862118