Is humour necessary in our life?

Humour and smiling are instinctive behavior in life. The pretty person always wears a smile. So humour is really necessary to live. Personally I think humour is necessary because in life we have a lot of problems and for that reason smiling and feeling happy are good sensations the only way to do this is to tell jokes. All people in the world, I think, laugh with that and make them happier. Consequently, people are more polite and the relatioship works more frecuently and quite good. Apart from that another reason to keep humour in our life is very healthy.