I saw this as part of the "Bavarian Sex Comedy Collection". I'd recommend the collection in general because two of the films were pretty good, but this one, however. . . Unlike a couple of the other movies in the collection there's nothing especially "Bavarian" about this silly, badly dubbed Teutonic sex comedy. A young married man somehow ends up becoming the resident stud of a luxury hotel in the German countryside. Naturally, his clientèle is made up of the kind of women who in real life would NEVER have to pay for sex. The three main actresses consist of his (slightly) plump but pretty young wife, a (slightly) older but sexy client who falls in love with him, and his ridiculously hot female shrink (who you just know is gonna end butt naked in some kind of professionally compromising position before the movie's over).
The guy is seeing a shrink as the result of impotence caused by various "traumas" in his "job". One woman (perhaps the best looking one in the movie) seduces him as he's sitting by a scenic waterfall while her elderly voyeur husband watches through binoculars--but then the voyeur gets jealous and decides to interruptus the coitus and finish the job himself. He next has a strange encounter with a pampered rich girl in a hammock. Then there's a girl who really likes biting stuff (you can pretty much guess how that turns out). There's also the maid of the inn who has a very homely face but a very un-homely rear end who he "accidentally" services much to the chagrin of the lecherous bellboy. But perhaps the funniest and sexiest scene involves a bespectacled PhD student who has trouble reaching and orgasm (she hilariously reads a book while our hero labors away) until he discovers her very bizarre(but admittedly pretty sexy)kink. This girl is played by the only actress (I think) I might have recognized, Puppa Armbruster, who was in a number of "Schulmadchen-Report" movies--and if sexy "older" women paying for sex stretches credibility, a pretty young thing like this doing it could only happen in the fantasyland of a goofball European sex comedy.
But I guess if you want realism, you should see a documentary or something. This movie is terminally stupid, but I guess it does what it does OK.