I don't know WHAT some of you are talking about. Maybe my computer has some global save from a past version or something that's granting me access? I had full access to the gallery of this version before even playing it, including new animations I'd never seen before, like the vents.
As I recall, Sex Ed was separated from the main game due to conflicts with some distributer (Steam, maybe?). Basically, "a zombie dog is still a dog, that's bestiality, so you can't release the game with that."
That's a big part of why they started the Subscribestar account, as a fair amount of people were primarily in it for the Sex Ed "mini-game."
To the best of my knowledge, work is continuing to be done on both the main story-based exploration game and Sex Ed, but since they now exist as separate games, there's not really any reason to wait to release updates for both simultaneously.