This situation is addressed quite succinctly in Aqua Teen Hunger Force, in which Frylock and Master Shake debate what to do with Meatwad's incredibly depressed, pessimistic doll, Happy Time Harry. Happy Time Harry encourages Frylock to kill him, but Master Shake, believing that's just what Harry wants, decides to make him immortal. So, he takes Harry to a cliff and prepares to throw him off, because "that's what they did in Highlander." Harry and Frylock repeatedly try to explain to Shake that you have to be born a Highlander, and that Highlander was fiction and not a documentary, but to no avail.
How will we know, when the morning comes, we are still human? - 2D
Don't worry, my friend. If this be the end, then so shall it be.
Don't worry, my friend. If this be the end, then so shall it be.