Earlier @The_Episiarch sent this to me and got me thinking how thick a Yokai should be to slither around in one's scrotum.

So in this essay, I will calculate the potential dimension of a scrotum-slithering yokai, Subakuchu, and discuss its— https://twitter.com/matthewmeyerart/status/1316657308059996161

According to healthline dot com an average testicle (not scrotum) is 4x3x2cm³, making it 24cm³ in volume

However, the Subakuchu lives inside the scrotum, not a testicle, which is harder to measure. So we'll use 48cm³ as the minimum volume of an average scrotum.

This raises the questions: Is a Subakuchu ethereal or physical? Can it occupy the same space as its host's organs, or would it need to displace some flesh to fit in there?

"they seem to disrupt the body in a physical way much like biological parasites, so I'd say they're physical."

Tommy Leung, [ @The_Episiarch]. (2020, October 15). Twitter DM.

Assuming it fully occupies the scrotum, fully displacing the testicles, the minimum surface area of a Subakuchu thin section is 48cm³/1500cm=0,032cm²=3,2mm²

This gives us a 1mm radius or 2mm diameter, for a 15000mm long Yokai.

"It's kinda ridiculous, but it *is* within the ballpark of how thick that whale dick worm is"

"And worms in the genus that whale dick worm is in (Crassicauda) grows to between 1-11 m long, depending on the species"

Tommy Leung, [ @The_Episiarch]. (2020, October 15). Twitter DM.

"And since Subakuchu is described as being "deadly" to the host once it gets to 15 or so metres long, I'd imagine it's probably bc it got so big that's it's gonna go all horsehair worm on the host"

Tommy Leung, [ @The_Episiarch]. (2020, October 15). Twitter DM.

Discussion: The calculations in this thread only represent a Subakuchu's minimum size, assuming it lives in an average-sized scrotum.

More research in scrotum expandability is needed to calculate a Subakuchu's potential maximum size before it bursts out of the host's—