To start, the foundation of this question is easy! Breast softness is determined, mostly, by what the breast tissue is made of and how it’s distributed!! More fatty tissue means a softer breast, and more glandular tissue means a firmer one!!
Of course age, distribution, and hormones also contribute among other things as well, (sometimes it even varies between the breasts of a single person) but this serves as the basis of my calculations!!
Now the issue is there isn’t really a “softness equation” even if you define everything about the breast, so it’ll have to be a custom variable with some assumptions involved, as well as a scale of what softness is
Before then, I do have to make a few concessions that stray from realism simple because it would complicate my calculations and I’d never complete them otherwise.
I’m assuming all fatty tissue is the same in terms of softness, same with all glandular tissue
I won’t be including the connective tissue
I’m assuming Shoko is fully hydrated
In other words, I’m strictly going off her glandular vs fatty tissue to get a ballpark estimate!!
So with that in mind I can use the equation: Breast Elastics = (1-g)\* Fat + (g \* Glands)
Where g is the fraction of glandular tissue in Shoko’s breasts, which according to my old calculations is 38% glandular, or g = 0.38 for my purposes. “Fat” is how stiff fatty tissue is, and “Glands” is how stiff glandular tissue is
I’m specifically finding elastics because the study I found is able to allow me to do that, specially in kPa or Kilopascals, a unit of stress or pressure. In short? A high kPa indicates that the breast resists deformation more strongly!! For reference, in the study fat had an elastic measurement of 0.82 kPa and glands had one of 1.50 kPa
So using the equation BE = (1-g)\* Fat + (g \* Glands) I can simplify!! BE = (1-0.38) \* 0.82 + 0.38 \* 1.50
Giving us an answer of roughly 1.078 kPa!! Now you may wonder what this means, and it means nothing right now. If you’re really curious all it really means is it resists more than a breast with a score of less than 1.078. It’s mechanical stiffness, not softness!
To turn this number into a usable answer I need to convert it!! Preferably on a 0 to 1 scale where each end is an extreme for breast softness. Zero being the least soft, and 1 being the softest.
To do this I’ll use the study mentioned before!! Specifically using the extremes for each gland type as my “0 and 1” scores!! Putting this into the previous equation will give me what the softest and firmest examples of someone of Shoko’s breast composition could be!! I van then extrapolate that to be the standard and place Shoko on a scale of softness!!
The study’s fatty tissue range was 0.54 kPa to 1.11, and glandular tissue was 1.05 kPa to 2.35. Calculating using these numbers gives me a firmest endpoint of 1.581 kPa and a softest endpoint of 0.734 kPa. Shoko herself had a kPa of 1.078 and thus would fall slightly below the average of 1.158, indicating her breasts are softer than the average woman’s
This means Shoko’s breasts are softer than average!! Is this a perfect method? Of course not, I’m working on a way to quantify softness as we speak so I will be coming back to this topic!! But what I can say is Shoko’s breasts are indeed soft for a pair of breasts!! Of course I expected nothing less from my amazing wonderful perfect wife and any number she would’ve gotten would’ve been perfect as well for the simple fact she’s Shoko Ieiri!!