The sense of humour
The sense of humour is a precious gift ,if you're lucky to have it ,it means you have the ability to think that things are funny and It's easy for you to say or do something especially a funny story or trick to make people laugh
A good or funny joke could light the mood and lift the spirit.besides,if you're an expert of telling joke,in some extent,you must be an easygoing person and if your joke is amusing enough ,no one can fail to understand the joke and burst into laugh.
Besides funny joke,still there are some other kind of jokes,sick jokes ,dirty jokes and terrible jokes.
Be careful about your joke,some people would like to play a joke on other's weight ,appearance,even shortcoming,not anyone has the ability to buy it.sometimes it may hurt others feeling and the joke will change into misunderstanding between you and your friends ,in this way ,a joke falls flat.