Like most people, I manipulate objects with my hands every minute of every day giving it little to no thought. I used my fingers to type this post, I clicked on my mouse to add an image, I massaged a tight knot in my shoulder.
As an architectural designer, I use my fingers to feel. I touch textures and surfaces, and I know that each one adds a different mood and contributes to the atmosphere in a space.
There have been many times in my life when I have experienced memories without thinking about it, simply by touching something which felt familiar.