Interesting subject. I've had lots of discussions over the years about empathy, sympathy, pity, compassion, and have studied sadistic offenders, some of whom can perspective-take and be more than able to feel their victims' pain, which motivates them to hurt more. Trying to strike up a relationship with a sadistic rapist, for example, is generally counter-productive as knowing how you feel and what the aftermath will be, fuels the attack, whereas (generally) non-sadistic offenders would be more likely to reassure or curtail an attack. I have experienced such offenders trying to wheedle personal information out of me with which to confuse or scare me. Complex issue. Perhaps there's a semantic difference - empathy with or without compassion?