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2d_animation 5:4 animated animated_gif anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro balls blush bodily_fluids duo echidna erection eulipotyphlan eyes_closed fellatio frame_by_frame fur genital_fluids genitals hedgehog knuckles_the_echidna krazyelf male male/male male_penetrated male_penetrating male_penetrating_male mammal monotreme multicolored_body multicolored_fur oral oral_penetration penetration penile penile_penetration penis penis_in_mouth precum red_eyes saliva sega sex shadow_the_hedgehog short_playtime sonic_the_hedgehog_(series)sucking