We're lucky stains wash of our skin as easy as they do, amirite?

I'm pretty sure the sole reason we evolved to have skin is precisely not to absorb random stuff from the environment. So it's not a matter of luck.

Yeah, that's definitely a blessing! Imagine if we had to use soap, scrubbing brushes and elbow grease every time we spilled something on ourselves - that would be exhausting!

I mean, with how often our skin is replaced, it would have to be a REALLY bad stain (think tattoo level stain) to last more than a few days regardless.