I don’t think anyone got this:
Forbidden Planet.
The Graduate.
But, that hardly describes the movie.
The Graduate
Valley Girl and The Graduate
A couple guys reluctantly take a vacation in Belgium.
Here’s a double feature. Scriptwriters forgot to have a plot.
2001: A Space Odyssey
The Big Sleep.
In Bruges. One of my favorite movies.
I’d suggest it could be a triple feature, along with:
Star Trek: The Motion Picture
Actually, I was thinking of Where Eagles Dare, hence the use of the word “improbable,” which is an understatement. “Highly improbable” would have been better.
Heck, you could’ve been describing that Bond flick with the invisible car…
I said “improbable,” not “farcically unrealistic.” But on the other hand…
Here’s one:
A 43-year-old man and a 19-year-old woman begin a torrid romance, but the movie bears virtually no resemblance to the novel whose title it shares.
Lost In Translation?
No, a much older and more famous movie. And the romance was both on- and off-screen.
To Have and Have Not
“Just put your lips together and blow!” 
A couple tries different camping spots.
Nuts in May
(heh - considering the flick, itself - not exactly the most emasculating description)
Two Army buddies are reunited after 20 years, much to the chagrin of one’s wife.
On her way to see her boyfriend, a woman gets tired and stops at a motel. Psycho.
Excellent!