What does the available and use options mean?
What are the differences?
Every option you activate goes in a pool the AI can choose from during the session.
Use forces an option. Available adds an option in the pool.
For instance, if you set the kink "Penis Stimulation" to "Available", it's possible that the AI offers no "Penis Stimulation" all session long. If you set it to "Use", you are guaranteed (?) to have some "Penis Stimulation".
It doesn't really matter since you can deactivate or activate all these before the session begins, using the "Display Used & Available Toggles" during the preparation phase of a session.
There could be a toggle that prevents that last minute tweak though? I didn't find it yet.