The last person on the moon was Gene Cernan. After three moonwalks totaling a little under 22 hours he was dirty.

Despite being sealed inside a space suit he still had to take it off and the moon dust kinda stuck to everything. Including his skin. And hair. This is just the dust that transferred to them from the suits or equipment brought back inside the LEM.

Where the lunar dust stuck around most was under the fingernails.

But as you can see, it’s no worse in practice onboard than other forms of dirt. It’s when the stuff goes on outside that it becomes nightmarish.

This is lunar regolith:

This is diatomaceous earth

You may have handled it before. It looks sharper to me. But it’s in your toothpaste and other cleansers you use everyday.

If you’re not an arthropod, it won’t injure your soft, yeilding body.

But if you are an arthropod with a chelatenous exoskeleton;