Rule 34 Dev - anal anal_penetration animal_genitalia animal_penis bdsm blue_body bondage bound cutie_mark duo ears_down equine_genitalia equine_penis feral gag gagged genitals green_eyes hooves horn knot male male/male male_penetrated male_penetrating male_penetrating_male mane penetration penile penile_penetration penis pink_body pivoted_ears quadruped restraints sex spreader_bar submissive submissive_male unicorn_horn ralek hasbro my_little_pony mythology fan_character gyro_tech saewin avian equid equine gryphon mammal mythological_avian mythological_creature mythological_equine unicorn hi_res|13251518455