Where does laughter come from in your life?

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This afternoon,I had discussion with my friends on the topic how we can make some on laugh.I tried some jokes with them,but none of them laughed.When I felt a little disappointed,someond farted,both making some noise and releasing some smelly air.All bursted into a laughter. Laughter comes from many factors in our life.Sometimes,happiness will bring happy laughter,while sometimes,the embarrassiing thing from others may make us laugh.Though we all know it's impolite ot laugh at others,we sometimes could not stand it.