I heard that the bathhouse directly mirrors establishments that doubled as brothels—specifically in Japanese cultural details that aren't decipherable by an ave

I heard that the bathhouse directly mirrors establishments that doubled as brothels—specifically in Japanese cultural details that aren't decipherable by an average Westerner or even an average weeaboo. Of course, as a Westerner I have no idea if this is true. A rewatch is still in the queue, so I haven't yet seen if this revelation affects the experience.