food for thought:

the technical difficulty in operating various kinds of boxes. shoe boxes, pizza boxes, donut boxes, the wierd flaps on boxes for various kitchen appliances...all are designed to make you feel intellectually inferior to cardboard in various geometric forms. think about it - you think closing up the box after checking your shoe size (or getting a slice of pizza, or grabbing a donut, or making sure all the parts are in the box for your vegetable steamer) and the flaps just WILL NOT operate correctly. no matter how many times you pull the lid down, you can't figure out why it doesn't work out. after several minutes of agonizing over this, you give up, leave the box halfway open, and feel like an utter failure because you couldn't figure out the mechanics of a box.