I don't know, but hopefully you can imagine going in for one and the physician admires such a big chest, then says, naw... we need to go bigger.
Extras | [gif version]  [small gif] • Source: Honoo no Haramase Motto! Hatsuiku! Shintai Sokutei 2
This gameCG is great... it's got so many iamges that I want to work with... I mean, look at this one: On the scales
They're hard to work with since I have to redraw so much, but they are fantastically fun to imagine.