Not just ass-slapping, I grab the flogger from the hook above the bed and lash her across the ass, the back, and the shoulder while doing her doggy-style (or as I call it, Discovery-Channel-style). It drives her wild and brings her to shaking, thrashing, quivering orgasms.
A previous lover had waist length hair, and I would wrap it around my wrist and forearm numerous times, so that I could pull her head back hard like reining in a horse as I was fucking her from behind.
Some girls love it; some hate it; some are indifferent.
God Damn!!
I'd sign up for that in a heartbeat!