@PraxisAshelin well, in light of what you posted in the beginning I had some "experiments" related to it, as teenager. Part of what I started with as "silly things we do as kids". :)
@PraxisAshelin well, guess I can't really know, closest thing I had is on that beach, where there was risk we'll be seen... but that's didn't cause me any trouble. Just the dam$ sand D: