Kathleen, OK, I'll give it a try, to unpack the basic drive (health warning, I love semiotics - see here, for example - it's an analysis of two pictures of "The Pope sat on the chair") ...
I would say
- we all want to be in touch with each other (figuratively and literally)
- so, we use touch, glances, movement ..
- we move on to sounds, to language
- all of which leave impressions - on the mind, the imagination, the subconscious ...
- then on to physical inscriptions - in the air (dance, music), on the ground (sandcastles, castles, highways), on the body (ours and the bodies of others)
- and in the process we become part of communities ...(like this online one)