1) To to encourage buying more buns, then more wieners, then more buns, to make more profit.
2) Alot of Bread is Circular, i prefer it that way personnaly, as for square bread, the charpe is stronger, and easyer to cut when fresh. The Intestinal tract of animals in whihc most meats are place are circualr, thus the meat is circular.
3) Gravitational pull (as mentioned on the simpsons), the water will turn a certain direction depending on which side of the equater you are on.
4) Because she is not real, and is a plastic Doll. Children who play with Barbies are generally young and dont have a use for a bra, thus dont see the point in having one on the doll.
5) No, no he wont.
Psht keep 'em coming.