So couple of things. The comments that mention interactions or following are from older builds, those features are no longer on the game. Familiarity it a system not fully implemented yet that will come with the intimacy update (check the roadmap for more details). As for gog and itch. Both stores are on the same version, some features we did not like so we depreciated them to build in another direction. Hope that answers your questions.
Viewing post in Sapphire Safari (Beta Access) comments
Yes! They will be familiarity scenes rewards. So as you fill in the monpedia of a species like the bunny you will unlock threshold rewards which is sex scenes with the species in question. Each species will have roughly 3 scenes with some slight variations depending on the players chosen gender.
We will have other scenes added in later as well so it won't just be limited to familiarity. But they won't be ready for the intimacy update.