Death

I honestly don't understand why people get so upset about the whole idea of death and suicide. Life is all about death. It's a one way ticket to it in fact.
People are so proud that they live their own lives, that they are in control, yet they just wait for death to happen. Something that could happen any time. Yet the mere thought of only mentioning it is enough to upset them. And I don't get it. People talk about more gruesome things even, without blinking. And not like I want to talk about their death (which I can imagine might be upsetting if you're happy with your life and someone wants to discuss your upcoming demise).
And why not talk about it. And what is so wrong about it. Things break, people die, nothing is forever.