I think, it necessary to let go of one's ego, in order to laugh authentically. When you can laugh at yourself as others would, there seems no difference who the subject is. The other aspect of laughing authentically comes up when one learns to let go of control in life, or one figures out that you really don't have control on most anything. You might think you are holding the reigns really tight but you fail to see if the reigns are attached to anything on the other end. Once the realization dawns that its someone else holding the reigns and its okay by me, that's when you can laugh about anything from the bottom of your heart.