The series is often framed by the hotel owner reading letters from former guests recounting their passionate stays.

You can have a $100 million budget, but if the leads don't spark, the movie is dead on arrival.

Think about the signature shot: Rain sliding down a floor-to-ceiling window. The flicker of the "Do Not Disturb" sign. The clink of ice in a whiskey glass. These shows use the hotel’s sensory palette (clean sheets, low lighting, the sound of the elevator dinging down the hall) to trigger a psychological response.

: A spin-off titled Hotel Erotica Cabo was released in 2006, following a similar format at a resort in Mexico.