Urban legends are not merely scary stories; they are "anxiety containers" for society. Psychologically, these tales thrive on the "Friend of a Friend" (FOAF) effect, which lends a layer of perceived credibility. They often function as cautionary tales, reflecting collective fears regarding safety, health, or technology. By analyzing the psychological triggers—such as the "disgust reflex" or "moral panic"—we can understand why certain stories go viral while others fade. These legends serve a social function by reinforcing community boundaries and shared values through fear.