eli5 : What is muscle memory and how can I get control it?

Question

Title

In: Biology

Answer 1

I had to learn morse code when I was younger (I know really old). It was so hard at first.
“OK, a dot then a dash, that must be A, OK better write down A.”
A couple of months later after hundreds of hours of practice. “I heard a sound, I wonder what I’m having for my tea, I seem to have written the letter A.”