I�d like to echo the sentiments of previous posters.  Your son is fortunate to have you as a sympathetic/understanding sounding board (Go mom!).  I had similar feelings/thoughts as your son when I was younger.  I also remember being scared of the intensity of my feelings as a child (particularly rage).  As an adult I still have trouble compartmentalizing my �empathy.�  While I understand the difference between real/imaginary, I have trouble not letting my feelings (when I imagine myself as someone else � as your son has described) impact the rest of my day.  I also have trouble turning sad thoughts off (again when I�m imagining how someone else may be feeling).  I attempt to filter �bad thing� that I read or hear about.  I�m also very sensitive to smell.  I�m not sure if this helps at all.  Your story made me reflective.