Apparently the amygdala in the brain is easily trained to extinguish shame and guilt. This came up after I saw where 3 women FAKED their own abductions, claiming they were abducted, held hostage and assaulted. They weren't even related cases. And the question arose, how can anyone LIE like that and concoct such an extreme and detailed lie...with no conscience? And that's how and why they do it. Lying does not bother them bc they have been lying a loooong time.