I read somewhere a couple days ago (I know it seems very valid and supported by facts) that laughing daily, even fake laughing provide a longer life. I am not sure of the study or even remember where I read the information but it seems legit to me. =)
So recently, I would say the past month or so, I decided for myself to laugh out loud whenever something is funny to me. The way I figure it, no one get mad at a person who is laughing so, I will laugh and other people will be happy.
Since I began doing this, I have found it quite refreshing to not hold my laughing back and really enjoy laughing out loud. It has been liberating. So I encourage you, next time you want to laugh but hold it back because someone might hear, just let it loose! Laugh and enjoy it!