system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it easy to type without looking but challenging to recall the specific order of keys on the keyboard?
gpt
Muscle memory.  The specific brain-to-nerve-to-muscle connection required to press the B key is seared into your system from thousands of repetitions, but it doesn’t also link to the part of your brain that half-assedly remembers that keyboards start with QWERTY.

You’ll see this in most physical skills.  Try to describe in words how to run or how to swallow.  It’s something your muscles just do without invoking other parts of the brain, and those other parts will struggle to articulate how it works.