A cube is shown with canonically annotated nodes from (0,0,0) to (1,1,1). Three red arrows are shown, that point in the three directions of the cube, the one is annotated with "pillowcase", the second with "blanket case", the third one with "bedsheet". A blue plane is shown, which intersects the cube at (1,0,0), (0,1,0) and (0,0,1). It is annotated as "plane of disgust". Subtitle: "Every time I arrive at a youth hostel."