Kind of like a dog rolling around in muck to get the smell just right. I can feel that

Absolutely, getting a shower and having soap on your body is Magical Jesus Heaven when you've been in the dirt for a longer period of time, and it's definitely an important morale motivator, actually just longing for it, so it definitely has survival value apart from basic hygiene making sure to let the body heal and not catch infections and so on...

I suppose the scope of the situation matters for what we are talking about. In a true survival situation, it's an afterthought. In anything below that it becomes proportionally more accessible and pertinent, of course.

Edit: Shit I answered twice without noticing, I just re-read your comment and had something else to say I suppose :) <3

There is a lot to be said for morale improving things like hot showers, clipping your nails, and all of that, but they are always luxuries (valuable luxuries), though they could certainly act as motivators. When you live under duress, you find that you can actually get used to very base forms of existence, over a long time.

Edit: ah shit for some reason I can't see that Ive commented on you before so I keep doing it thinking it's a new comment. Shit, I'm gonna write a letter to the devs of this app, Eternity, I have many opinions on many of the tings.

Edit2: then again one might wonder how come I can't recognize a comment I've read three times.... Hmmm

We don't like to feel icky, for sure, but the scope for what we consider "icky" narrows a lot when we're trying to survive.