why do we get fascinated about GUNS and WEOPONS(violence)??????

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very simple question:- every time we see a hero fighting in a movie,why we get fascinated??? surf around the net and you ll find thousands of profiles on social networks with their photo albums loaded with pictures of guns and weopons our most of the biggest Hit movies are based on the wars(eg:-troy,300,gladiator). we may call ourselves religious(spiritual) from outside but this is the fact that there is still a lot of violence left in ourselves. so waiting for your views,why we get fascinated??? thanks peace.