[polishdude20]

This can be applied to anything that gives us comfort. I take the view that we do these things because of a deep psychological knowledge that we will die. There's a book called The Denial Of Death. It's speaks all about how a lot of choices we make (almost all) once you still down deep enough, are because we are creatures who know the power of our own minds but also are aware that we will die one day.

Another way to think of it is, we have kinds that can imagine and simulate anything. We are practically gods in our own minds. The tragedy is that we have this power but will sooner or later die. This is a tragic a deep realization we all have.