We know a great deal about physical touch, for example, on the immune system. Physical touch releases growth hormones that will help your immune system recover. Without touch, the immune system cannot recharge. Everybody needs to be touched and although most of the massage research literature on touch deals with babies, the need for massage certainly continues throughout life. I do believe we are a touch-deprived culture.
People are afraid of being sued if they touch.
You can't even have a teacher any more touch a crying child. What has happened in our society regarding touch is truly pathetic. So going to a place where it is safe to be touched is very, very important. It is effectual at the most basic hormonal, physiological, and immune system level. The second component is the specificity of the touch.