Italo Western, aka A Man Called Blade
Seems like the town's prostitutes are bound to be whipped (no spanking here, just back whipping).
Martine Brochard might be the (only) girl on the receiving end.
Clip: https://www.4shared.com/s/f4n0ailUSjq
IMDB: https://m.imdb.com/title/tt0076360/