When you open a fresh jar of peanut butter do you only work through one side until it is completely empty then start on the other side?
Or when you get those shallow tubs of hummus does it have to make it back home undisturbed? Then one of the baggers at the grocery store shoves it sideways into the bag completely ruining the symmetry.
Any time I buy chips and dip I have to always work from the top of the dip down, trying to keep it level all the way down. I have no idea why I do this, but it drives me crazy otherwise. If someone else takes a chip and digs straight down to the bottom of the tub I just don't want it anymore lol