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2020 anthro ball_gag bat bdsm bite biting_lip blush bondage bound breasts dominant dominant_female duo echidna erection exposed_breasts female gag gagged grin hands_behind_back hi_res kneeling knuckles_the_echidna ladycherrybomba male male/female mammal monotreme nipples restraints romantic rope rope_bondage rope_harness rouge_the_bat sega smile sonic_the_hedgehog_(series)submissive submissive_male