Amy,
Great topic.
I would like to comment on psychological and moral boundaries.
As a physical therapist with a degree in counseling I have danced on the edge of boundaries with many a patient. In reality I like to think of myself as a psychosomaticist in my dealings with mind and body.
As a physical therapist I have used manual (hands on body) techniques for many years. And have on one or two occasions triggered anxious emotional displays in clients through my own ignorance of trampling a boundry I was untrained to perceive. So, I got more training. And, realized that because of my position as a medical care giver I was allowed to function in ways that would rarely be allowed in most "normal" interactions. One of my teachers told us that when a person allowed us to touch their body we were being given "unearned intimacy" and this was to be respected and honored. As I learned more about human psychology, I realized that there were individuals, usually those who suffered incestuous relationships or early childhood trauma who could be injured in a "therapeutic" relationship though the ignorance of the practioner. These damaged individuals would often lack the understanding of what was theirs (for example - their body) and that they had the right to say "no" when something was uncomfortable or unwanted. Two excellent books on this subject are:
Where the Healing Waters Meet and
Compassionate Touch by Clyde W. Ford. Our health care system is often the most egregious of our social systems in terms of trampling personal boundaries.
Children are particularly vunerable to the disruption of forming healthy psychological boundaries; usaully at the hands of trusted adults. This is where morality comes into play. Children need to be given permission to develop a sense of ownership over their own bodies and thoughts. Adults who don't respect this can cause harm that lasts a lifetime.
I'm not sure these are the boundaries you were expecting to discuss. But, for me control of one's own body and the sanctity of one's own thought is paramount. See an article in today's New York Times on the use of antipsychotic medications in children.
Books Discussed