A wise man once sat in the audience & cracked a joke.
All laughed like crazy. After a moment, he cracked the same joke again and a little less people laughed this time.
... ... He cracked the same joke again & again, when there was no laughter in the crowd, he smiled and said, "When u can't laugh on the same joke again & again, then why do u keep crying over the same thing over and over again”