Tinto Brass is still probably best known in the English speaking world for "Caligula", however most people don't realize that he's had quite the career up through today making soft-core erotica, the type of which hasn't been made much since about the 1970s.
What sets Tinto apart is that he has a very specific list of things that obviously turn him on such as: unshaven underarms, mirrors, infidelity, and most famously, the female rear end. All of these tend to show up in all of his films, including "Monamour". So, it can sometimes feel like if you've seen one Tinto Brass film then you have seen them all. They differ however in quality of script, actors, and scenery. "Monamour" is paint by numbers Tinto Brass. Tinto fans will find all of the usual hallmarks in this film, however little more. I am a bigger fan of his earlier films that I feel have better plots, acting, and scenery while touching upon the exact same themes as this one.
As other reviewers have commented, it feels like later day Tinto films feature female characters who are less realistic than in his earlier films, and certainly no woman in real life would ever act like the lead character in "Monamour" who basically can't say no to any man (or woman) who wants to touch her. This is pure male fantasy, making this film a bad choice I think for couples, especially when compared to Tinto's earlier films. A single male however, provided that he enjoys the same things Tinto enjoys can enjoy this film just fine, especially as Anna Jimskaia is one of the more beautiful Tinto Brass leading ladies in my opinion, and you do see a lot of her!