Not realistic about female body hair
An unfortunate lapse of realism in this mostly excellent film is that in those scenes--taking place in the sixties--in which the character Ada and various female bathhouse patrons are shown full-frontally nude, they invariably appear to have trimmed or completely shaven pubic hair, as well as completely shaven armpit hair.
Unless I'm very much mistaken, that's quite unrealistic for Eastern Europe at that time. It's my understanding that, up until the eighties and nineties, most Eastern European cultures were holdouts against the spread of the horrible twentieth-century (and now twenty-first-century) trend of mostly or completely eliminating female body hair.
I would hope that director Javor Gardev, who was born in 1972, is not so ignorant of his country's (Bulgaria's) recent cultural history that he actually believes women were shaving themselves in that way in the mid sixties. More likely, the creators of the film failed to plan ahead and get actress Tanya Ilieva and the various bathhouse extras to start growing out their pubic hair and underarm hair several months in advance; with the result that, when shooting time came, it was too late to do anything, short of resorting to expensive expedients such as adding real or CGI merkins. They probably hoped that not many people in the audience would notice or care. In committing this failure of advance planning, the film's creators compare unfavorably with director Ang Lee, who did make sure that female actresses and extras appearing nude in Taking Woodstock (2009) were realistically endowed with the full pubic hair, and in many cases armpit hair as well, characteristic of that film's 1969 time period.