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anthro argento balls bdsm bent_back biped black_body black_fur black_hair bondage bound erection eulipotyphlan frogtied fur genitals hair hedgehog humanoid_genitalia humanoid_penis legs_tied male mammal penis red_eyes restraints sega shadow_the_hedgehog simple_background solo sonic_the_hedgehog_(series)spread_legs spreader_bar spreading strapped straps submissive submissive_male