Yes, optional unlocks. It would one of the higher Lust Tier tags in some magic potion category that is not even in the game yet. I plan on variety of fetishes, it's just I haven't gotten to implementing lewd content.
My goal is to create a lewd game with engaging gameplay, and customizable experience as far as adult content goes by giving players options what fetishes they want to unlock, and how perverted they want the game to be by unlocking Lust Tiers.
I hope you are going to look forward to all that.