As you can see from my thumbnail sketch of psychopathic traits in a previous post a little earlier in this thread, they don't have any angst , save only largely imagined wrongs done to them. They lie ,cheat , and abuse friendships in all ways possible, yet get incredibly angry when anyone rejects them. psychopathy is a spectrum trait, some of us with just the minimal soupson of it, giving in to a little selfish self grativication,say eating the last chocolate in the box rather than offering it to our mate, friend whatever, others with a major trait yet still capable of strategic thinking become captains of industry, politicians etc. Fully fledged psychopaths are so into their own fantasies, and so much at the mercy of them that , whilst they can lie through their teeh with such apparent sincerity as to convince the most experienced sceptic, they think only tactically, and never learn from experience , and so get found out eventually. So the most dangerous , are those with a strong trait but with a cabability for strategic thinking, who tend to gravitate to the top in such areas as politics, business and crime.
Yes it's an interesting one all right. It's supposed to be under-diagnosed. I would speculate though that psychopaths would be over-represented in BDSM circles, so if everyone would like to step forward and fill in a personality inventory....