However, further research has shown that it is the normal condition for humans and for most other mammals. It seems pretty clear why this is the case for most mammals and for most human beings.
“I never play a villain that I don't have something I can either do or say so the audience sees there is something redeemable about them. In other words, I don't want to do evil for evil's sake. I don't want to do Jason slasher movies. There's no point in that.”