Is it natural for humans? i wouldn't say it's natural...but humans seem to be the only ones who do go against the warning. Maybe it's because we have a different intelligence than other species. A rationality that leads to curiosity and rebellious opinion.
You certainly don't see antelope signaling to it's herd "hey there's a pride of lions around the corner, DON'T GO THERE" and his buddy antelope says "aw screw that, I'm going to check it out".
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