Psychopaths and Sadism - What's the Difference?

The more pragmatic you are, typically the less conscience you're going to have. Psychopathy doesn't necessarily... How does it match up with sadism? Because if you don't feel what other people feel, why would you get off on causing people pain? And maybe that's just a popular imagination that we've married those two. No, they are related. They feel very much. It's all self. If further someone goes into self, it's not just an intellectual kind of thing. So you don't become just a little bit psychopathic and a lot of things are changing.