I could see ongoing watching harming a kid, but if they stumble upon porn one time by accident and see it? I don't see how that could harm them. A kid with a p

I could see ongoing watching harming a kid, but if they stumble upon porn one time by accident and see it? I don't see how that could harm them. A kid with a peanut allergy who came into contact with peanuts, even accidentally one time, could be fatal.