There are some things we never talk about, but always think about. What would it feel like to be dead? What's after the death? How would you die?
Maybe it's just how we are made. We don't know when we would die, so what to expect? No one ever came back from the death so how would we know? Even if people think they would know, they don't at all. Life is short, so what if "The After" is longer then life is? What if you don't realize you're dead and just live your life?
Then you might have a never ending life.