Here's an interesting talk from a psychopath https://www.youtube.com/watch?v=fzqn6Z_Iss0 He made previously an other confession, which was less funny and much darker. Unfortunately it's gone now. I guess, he had a second thought, and asked to remove it. As far, as I remember he mentioned, for example, that if someone did something bad to him, he could not forget it and he would get even in some way, no matter if years had to pass. Also, another interesting talk related to the subject https://www.youtube.com/watch?v=bysVPcKQfeY