One day, when I was about 5, my dad wanted to take my picture. He sat me on this round imitation Duncan Phyfe table and then he said "smile." So, in order to smile (laugh really), I tickled the bottom of my own foot. I don't know how I knew to do this, but it was one of the earliest and most important lessons that I learned in life. I still have the table. It's in my living room.