Jokes, create problems

Many times in life we face situations in which only we know that we were not wrong but nobody believes us, not even our closed ones. Why?
As we all know that cracking jokes make people happier, then why sometimes those jokes become thorns for someone? This is the point to think.
Because not knowingly we make fun of something which is related to someone's feelings or may be it looks like an insult for that person. See many things around us, within us, etc are given by GOD or developed by nature. So in any sense it is not appropriate to make fun of those things or to insult anybody whatever be your intention is behind this.
Think upon it!!