If you were to take note of the callouses on my left hand, you could probably track my moods fairly well. When I have things on my mind - good, bad or ambiguous...my fingers start itching for my guitar.
Through the years, I have expressed my emotion through various art forms, but more than writing, more than painting or sculpting...my fingers dancing across the fretboard in familiar patterns can just calm my thoughts. Somehow I put the guitar down feeling better than when I picked it up. Concentrating on the feel of the instrument in my hands, of where my fingers need to go - my subconscious can move freely about the issues with little interference from me.
Old songs that bring nostalgia, new songs that I want to learn, if I'm lucky, I might even write something. But when I put the guitar down, I'm happier. And usually go through the day singing.
Yesterday, I picked up a skillet, and held it for several seconds before I realized that I was holding the extremely hot metal part - necessitating a little jog across the kitchen to the table.
Note to self...heat might take a few seconds to travel through deep callouses, but it gets there eventually.