What would be an example of an unnatural sentiment that humans do not have?

When talking about sentiments like sentiment that your life is meaningless, sentiment that we are all slowly dying, sentiment that we are forever alone etc., people often say that these are natural sentiments that humans have and that we can't expect all people to be happy all the time. What are some examples of unnatural sentiments that humans do not have? Are there any sentiments that are expressed in literature and music that humans don't actually feel?<br><br>&#x200B;