More than 400 years ago, men were whipping women for sexual gratification. This is no kind of new fetish:
When Francus comes to sollace with his whoore
He sends for rods and strips himselfe stark naked:
For his lust sleepes, and will not rise before,
By whipping of the wench it be awaked.
From In Francum by Sir John Davies (late 1590s).