Has every kid in the world found that?
Can remember roving the local park and stumbling upon badly-hidden copies of the Naturist magazine Health and Efficiency, featuring greyscale photos of naked young ladies in various athletic and sporting poses.
They were naked except for mysteriously flesh-coloured (that's grey of course) little skin-tight panties.
I now realise that photos were expertly processed with the panties painted on at some stage.
As indulging in, say, archery or angling with a naked chest looked a bit risky I concluded that they were only
pretending to shoot arrows or catch fish.