Shame the book couldn't have said that "communication" is the most important aspect of a BDSM relationship (or any other relationship), since Xiao Lu clearly doesn't understand at the end that it's just supposed to be neglect play. But I supposed if the author tried to teach Tong Tong that, all potential future yuri plotlines would have simultaneously imploded on themselves at once.
ooooooooooooooooh boy, she's gonna follow that book so well other girl misunderstands it as true neglect for their next drama, then fake gay is gonna try and sweep her up