Cicero, Marcus Tullius Cicero to be exact, wrote the book How to Grow Old, in Latin of course, in about the year 40 BC. Through the work of others, it has been preserved and has been available for lo these many years. It was a favorite of Ben Franklin.
It is a good example of the difference between other life forms and us. He wrote his thoughts over 2000 years ago, I read them yesterday.
Many of my contemporaries are involved in the arts. I write and act. Some paint; others write poetry. Some sing, others act or are involved in theater or video. All of us are busily expressing our particular talent. As a group we are piling up a vast number of examples of our work.
Then multiply that by the many others in the world today who are doing the same thing. Then multiply that by years that this has been going on, from cave paintings until now, and you have a landfill volume that rivals discarded trash.
Every one of us, from before Cicero to now, and even beyond today, does this to express ourselves. I doubt if any one of us cares if another sees and/or appreciates our talent. It is simply important for us to express it.
This need for expression is not unique to humans. Birds sing, lions roar, elephants trumpet and shove each other. Almost all animals perform for one reason or another. Often it is to demonstrate superiority for the privilege of mating.
The difference is that ours can be preserved. We may do it because it demonstrates our talent to ourselves and anyone unfortunate enough to listen. For us it could be a notch in the belt of immortality, just as is Cicero's book.