Sheldon Cooper (narration): While my sister and I are twins, we've always been different. By the age of two, I was reading books. Missy was content to eat them. By five, I had a healthy appreciation for a well-organized work space. My sister, less so. Which is not to say she doesn't have qualities I admire. (scene of Missy killing a spider) The bond between twins is an incredibly close one, which is why I moved 1,500 miles to California the first chance I got.