There're crawly things down there.
Damp and dusty and moldy. Has to be done.
Maybe a drain needs to be snaked out. Costs a lot.
Maybe you're the only one can crawl through. Someone has to do it.
Once, long ago, your dad was too old and you did the job.
The last time you were older than your dad had been. But, still, you're doing the work.
Doing dirty jobs that need to be done.
Some have never had dirty hands. Not literally.
Metaphorically? Yes. Dirty hands, hearts, and souls.
But, here you go down into one more crawlspace.