UNDER-Analyzed would be a more appropriate title in this dubbed import. Anal is a very, very small part, as a doctor, writing a book on sexual behavior, hears a half dozen tales relived in typical Euro fashion.
They play it straight, but the dialogue is, albeit probably unintentional, rather humorous. For example, a case study on Nacho Vidal is entitled Compulsive Misogynic Phallic Egomaniac and includes dubbed dialogue (from Vidal) like "but Doctor, are you 100 percent sure that you don't want to see it? You would be joining a very select group of men who have had the privilege of seeing it in all its splendor," when referring to his dick - and this is not a gay movie. And so on.
The sex, with Sophie Evans, Laura Angel, and other unidentified folks ranges from couples-conventional to d.p., but most of the effort is in the dialogue.