After a pet has progressed far enough in its Stage 1 tutoring, it then falls on the Instructor to start educating the thrall in other things. Depending on the kind of material they're working with, they may want to take a more out-and-out sexual approach, but for most material some method of 'exploration' is required first, to gradually dismantle unhealthy ideas about intimacy and to get them used to touching and being touched.
Typically, as with all pleasure thralls, it's common practice for the Instructor to serve as a guide to the material's own explorations, but if they're comfortable with a material type then the Instructors can sometimes try something bolder or more experimental to expidite results.
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Fun times eh? Been meaning to get back to this series for a while. I do believe these'll be down as unlockables in the main Thrallgame (probably purchased with in-game company credit). But hey, here's good too!
Also attached is a higher-quality WebM, and a png still of the *full* view...which isn't much wider than this one, but you do get to see P-P78's Instructor more clearly- Catherine Adair, who is something of an expert in handling Azula-Material, and someone who Keller and the player will likely see in the game.
Enjoy!