Is Humor necessary to survive?

Tell me that somebody hasn't ever laughed, It is clear that I won't believe you. So, in my opinion humor is necessary to live well.

First of all, sometimes I hear from the doctors and psychologist that laugh good for life. I don't know the reason but I think that its true, laugh makes life easyier. In addition, they say that if you smile, you pass the information to your brain that you are happy (try it now, its true).

Secondly, there are a therapy called "laugh therapy", that consist in how to laugh about everything in your life that isn't really funny. This therapy helps a lot of people that are sad always (be always sad can be a disease).

Thirdly, there are different kinds of laughs, there are the good laugh that you laugh about all with everybody, and there are the bad laugh that consists n laugh about everybody. I know that the secondly is funnyier but in the other hand, "laugh about the toher people is wrong".

In conclusion, if your life is sad, I recommend you trying to make it (laugh more), but if your life is good without laughs, you can improve it if you try to laugh more.