Hey fun facts that are fun together :
* as a reverse engineer, I have worked on extracting these sorts of arts from hentai games.
* the game art does this sort of thing so that the story can toggle between different versions. Maybe you didn't get enough Friendship Points with Tgirl Jessica, so she's not ejaculating in this picture.
* the games are often smarter about this than the galleries: instead of storing every combination of ejaculating/not-ejaculating, they store 1 base image, then separate per-dick ejaculatory overlays. So if you've got 4 dicks, this means they have 5 images instead of all 16 possibilities. But this makes no sense in an image gallery, so you have to compose the images together. You'd think all-off and all-on are the only options you need, but some people are content maximalists. (it's possible site policies regarding quotas and stuff is encouraging this behavior).
* around the same time I was working on tools to extract images from hentai games, I also was working on tools to steganographically hide files inside images, in several ways. This was in part because I was working with 4chan at the time and helping them catch files hidden inside images, because channers were turning 4chan into an arbitrary file sharing site (is it a jpeg or a neutral milk hotel album? It's both!), using it to bypass filtering/moderation (you put an image inside an image and now you can't see the internal image unless you extract it. Maybe it breaks the rules. Breaking the rules on /b/ is very bad), or hiding viruses in there (viruses that then post themselves back to 4chan and the cycle continues!)
* This is also when I worked for the US government
So all those facts put together, I'll just say that IF it turns out secret government agents were hiding confidential information encoded into the images of hentai game ejaculations galleries, then... it was me, and I did it back in 2009.
