I mean, you can name a-anything anything. I could say I'm called the Ultimate B-bikini Model but that wouldn't make it true.

[Her fists clench, unseen over the phone. Why was she cursed with such a loathesome body....if only her breasts were a bit bigger, even just a sliver!]

No, as far as I know all we've got is theories. Whether it's b-branding, like livestock, or price tags, or just a headcount of people on the train...we'll have to look for answers in the next train car.