Well, I learned my lesson rewatching "Dr. Zhivago" (the 1965 entry in my "imaginary movie project"): A beauteous movie-star woman in a dramatic geographic location is just necessarily going to have hot sex with the best-looking man.
It doesn't matter that Guenevere is married to the king, and he's pretty nice and means well and all and he's not horrible looking (though what's up with the eyeliner?)...

Franco Nero comes to town...
... and sex must be had with that guy. Not just flirting and teasing, as you might think as things crank up in the first hour of this 3-hour monstrosity, when hordes of extras are cavorting and frolicking about how it's "the lusty month of May... when everyone goes blissfully astray" and "tons of wicked little thoughts merrily appear" and "When every maiden prays that her lad will be a cad"...