I can answer the last one. It's because the baking trays for buns have 8 slots and the people who make them can't be bothered to accommodate our reasonable desire because we really don't have any other options then to make them ourselves. It's pretty much that simple.How many chickens would it take to kill an elephant?
Where is the strangest place you’ve urinated or defecated?
Why do hot dogs come in packages of 10 while hot dog buns come in packages of 8?