Why do humans feel happy when someone else is feeling sad because of them? Over the course of my teenage + adolescent years, I have noticed this weird behaviour. I'm going to use a scenario that most people might understand. Suppose A breaks up with B. A is the dumper, B is the dumpee (there's always a dumper and dumpee. There can never be a mutual breakup).So technically, A should be alright, while B is down in the dumps. Now after sometime, B (hopefully) has gotten over the dumping. Now, if A finds out that B has gotten over him/ her, then A feels disappointed. A wants B to feel sad because they were dumped by A. Maybe A wants this person to remember the good times they had and feel sad that those can never be again. Why do people want this? Why should you feel happy when someone, whom until recently you cared for, is suffering because of you? Is there a twisted sadist in everyone of us? I believe that this provides people some validation of their o...