As for sunscreen: no strong opinion on its chemical properties, but I just avoid long durations of sun exposure at latitutes and seasons that's an issue. And I wear a hat.

That said, when the above is insufficient, I'll take my chances with whatever is for sale, rather than macho through sunburn and skin cancer (my skin color evolved for high latitudes).

I also vaguely remember reading (as that seems to be enough basis to make a bold claim these days) that kids instinctively seek out shade during play.