The document discusses the theory of desensitization, where repeated exposure to violence in media can decrease audiences' sensitivity over time. It provides examples of how horror movies have become increasingly graphic, and events like the Columbine shooting intensified debates around media influences. While over-exposure may make people accustomed to fictional violence, real-life impacts are still possible, like mimicking acts seen. The theory is somewhat similar to the hypodermic needle model of direct media effects, but research also shows moderated links between media violence and real aggression.