Well it's certainly possible, I haven't tested it properly though.
Sorry to barge into the conversation, but what exactly are you trying to do with ejaculation stock? Like, do you look for the way to increase the amount of orgasms the inmate can have or do you actually go deeper into code to change how the whole ejaculation stock system thing works?
I don't want to look lazy or ignorant, I'm currently still looking at the last few posts to understand what you are after.
Edit.
So the person was looking for a way to increase ejaculation stock for enemies, basically make inmates into studs, who can cum 2 times +.
I don't know how good this solution is, since I haven't really dug into to how orgasm system, especially energy and volume works, but the easiest way to make enemies cum multiple times is to go into Karryn's Prison\www\data, locate "\n<Ejaculation Stock: 2>" in Enemies.json file and insert into desired unit's "stats"(obviously increasing the number).
I've done it before and still using it, the only problem I could encounter is the cum volume not being consistent or if you put number more than 4, there is a chance, that the inmate just simply will leave combat on their forth orgasm, hence why I started to talk about energy and cum volume.
Though, I'm pretty sure it depends on player using Karryn's sex skills, which seem to drain enemies quickly.
So for example you're using Vaginal skill on inmate until they reach maximum pleasure and cum from it, which makes them cum more, but from my experience that more powerful orgasm counts as two. Hope that makes sense?
Edit 2.
Forgot to mention "\n<Ejaculation Amount: 14>". It seem to directly affect the volume, however it doesn't work well with Ejaculation stock.
Example: you put a high Ejaculation Amount and want inmate to have four "rounds", but because of the higher volume, inmate could probably unload whole gallon and will be done in just one orgasm. How and where you can change I don't know. Most likely energy related thing. Did manage to have Tonkin cumming around 80ml four times in a row on older build, though.