> Why do we think that way when we're young, that we're immune to damage? What changes? I'm not saying that all of the "life experiences" answers are wrong, bu

> Why do we think that way when we're young, that we're immune to damage? What changes? I'm not saying that all of the "life experiences" answers are wrong, but I think there's more to it. For an organism to be successful it has to survive (to a point), but it also has to be efficient at doing physical tasks. I think we're naturally inclined to push our limits at a young age so that we know where those limits are, and we can more safely straddle them when we're older. Evolution could have made children cautious, and it did, to an extent. But there is a balance. A child who is too cautious never learns how to run safely, and an adult who doesn't know how to run safely can't chase a gazelle very well.