BDSM is a very special sexual sub-culture, and not everyone can get involved in it and get to the bottom. This is a tradition of someone, being a master (and most often a very brutal and insolent one), and someone other (most frequently some of them), being a slave. Flogging a victim with rod, belting him to some platform or roping limbs and hanging under ceiling is a widespread practice, and this is not all by far what those perverts are capable of.
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