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angelofhapiness ankles_tied anthro black_body blush bound clothing digital_media_(artwork)duo echidna erection eulipotyphlan feet fingers footwear genitals gloves hair half-closed_eyes hands_tied handwear hedgehog holding_object humanoid_genitalia humanoid_penis knuckles_the_echidna legs_tied lying male male/male mammal monotreme narrowed_eyes on_back open_mouth penile penis penis_milking penis_milking_machine sega shadow_the_hedgehog simple_background smile sonic_the_hedgehog_(series)standing tail teeth toes