This one's a bit difficult to categorize. So, I'm just going to put it here. In this much maligned biopic about the last days of Rolling Stones founder; Brian Jones, there's a weirdly placed flashback montage (of things that happen later in the film. So, a flashforward in a sense?) where we see Monet Mazur (as Anita Pallenberg) tied, nude to a bed post, while Leo Gregory (as Brian Jones) whips her. Later in the film, we see where this footage comes from, and it's a choppy, artistic attempt at an LSD trip. We see both characters switching back and forth in the dom/sub roles. There are only a couple flashes of Mazur being lashed all-in-all, and it appears to be very low on the back/upper buttocks. So, it's close enough to me. You can also see Monet Mazur getting a 1-smack from Jaime Pressly in the 2004 action cheesefest;
Torque.

Clip:
https://mega.nz/file/nUgXGRxY#HkfIbHWfT ... XXKcmtlN90
I also pieced together a frame by frame, slowed down version of both shots together, as the in-film version is very quick.
Clip:
https://mega.nz/file/aB4S3KQZ#RgtfHwgqQ ... OJWlZnWZ2Y