article_snippet.sent: (CNN)Danny Kahneman, my good friend and co-author who got a Nobel Prize in economics, once helped to run an experiment involving patients undergoing colonoscopies.  
article_snippet.sent: One group received a mildly pleasurable experience at the end of the procedure; the other group, which experienced the same type of colonoscopy, did not.
article_snippet.sent: It turns out that the group for whom things ended well had significantly more positive recollections of the whole affair from its beginning.
article_snippet.sent: The psychology of it is simple to understand: Happy endings matter.
article_snippet.sent: Even an unpleasant experience can lead to happy memories in hindsight if it ends well.
article_snippet.sent: Here is the happy ending that Kahneman and others have shown can mitigate the memories of unpleasantness past.
article_snippet.sent: Of course, these kind souls want these kind souls happy endings too.