What people get off on in the sexual sphere is many and varied. Clowns are even a thing.

And dressing up as furry animals is also a thing.
Instead of going out of way to denounce and persecute these behaviours how about instead we try to appreciate there's only so many ways to have sex, and changing things up doing other than intercourse is just one of many ways of keeping sex fun.
Is hitting your sex partner because they want you to objectionable? To some yes, to others no. But should we denounce something just because some people have a problem with it? No. If something's so bad it deserves to be denounced we'll make a law restricting it. Otherwise, live and let live.