Professor Marston and the Wonder Women, which premieres Oct. 13, is a film about Wonder Woman's kinky, bondage-filled origins.
If you didn't know, the superhero was originally created by William Moulton Marston, a psychology professor who enjoyed engaging in BDSM with his two wives, Elizabeth Holloway Marston and Olive Byrne.
In keeping with the film's theme of nontraditional love and alternative sexuality, composer Tom Howe actually infused sounds of whips and spanking into the film's score. Take a listen to one of the tracks below!
Those thwap-ing sounds? They're actual samples taken from a recording session with dominatrixes.
Dominatrixes went into the studio for a day "and recorded a whole host of different noises of slaps and whips," Howe told BuzzFeed News. He said he'd been experimenting with various percussive elements when Professor Marston director Angela Robinson suggested incorporating sounds of spanking into the music. "So then I got a whole roll of, literally, hours worth of different whips and spanks," he said with a laugh.