> Why do we think that way when we're young, that we're immune to damage? What changes? We experience more death firsthand? If I hadn't had to clean up car acci

> Why do we think that way when we're young, that we're immune to damage? What changes? We experience more death firsthand? If I hadn't had to clean up car accidents and watch a friend lose her intelligence to a helmetless bicycle accident, would I still feel invulnerable? There's a theory that, from an evolutionary standpoint, young men are wired to fearlessly fight and die to protect the rest of the community. If they survive long enough, they calm down and take on other roles, letting the new generation of kids take over as cannon fodder. Take with a grain of salt, obviously, because we're all a lot more complex than our evolutionary history, but it seems plausible.