What tickles your funny bone?  What causes you to crack a smile?  What makes you laugh until tears run down your face?  Or are you one of those folks that have never had that experience?  I really hope that you have experienced a good old laugh-till-you-cry. When I am tired, it does not take much to make me laugh from my gut.  If you talk to me after 10 p.m., I would probably have you thinking that you were the next great comedian.  The simplest joke or sideways comment will set me off.  Shoot, sometimes I have to tell myself to calm down.  Just last night, I saw a meme…