Texture. People have it too. Nature has the type of texture that the senses work on. Cold wind, warm sun. Leaves and grass and fluffy little dogs. But people, they have it too. Not everyone takes the time or makes the effort to sense people texture. I try to. It used to be part of the way I did my job. Worked, most of the time. Now I use it. Not only in my writing but for enjoyment. It makes every day worth getting up just to find out what new stuff I will learn today.