Sense of humor is an human side, which if is developed correctly, could be an advantage in life. You’ll be able to integrate more easily in society, because people will appreciate this. A good joke made at the time, will arouse amusement in a group of friends, and this thing will maintain a good atmosphere. Not everyone could have the ability to have sense of humor developed because not everyone could react well in the specific moment to make a good joke. If you don’t have a social life, you won’t be able to a “jolly” person, because only if you interact permanent with new persons, you could develop this. But also, the other people need to know how to appreciate a good joke.