The final wipe isn't because you've truly cleaned everything, but because the stain has faded to a point where you can accept it.

Life is the same way— the more you try to force things, the more problems emerge, popping up like little secrets you can't hide.
So, life and wiping your butt are actually very similar: it's not about making everything perfectly spotless, but about learning to see things lightly, to gently let go of yourself.
Just do your best, and the rest… leave it to your underwear.