Some years back I was learning to play guitar. I had a classical guitar and a book of exercises, and I was practicing the easy ones. I was struggling with pieces that only involved working on the top of the neck.

The woman I was dating at that time asked if she could try. She paged to the back of the book and started playing complex pieces that involved a lot of transitions up and down the neck, and was playing them seamlessly. I asked when she had learned to play guitar, and she claimed that she had never had any instruction. Instead, she said "my fingers just know where to go."