You invade the personal space of others at your own risk.  Some people do not welcome the touch that others may crave.  I have noticed that some people are natural touchers and huggers, but others like to keep their distance.  Like most of you, I'm probably somewhere in the middle on this issue.  Please e-mail me at:  pjones41@kc.rr.com, and come join me on facebook, too.  Farmville, anyone?