Rule 34 Dev - animal_genitalia animal_penis anthro balls becoming_erect chastity_cage chastity_device equine_genitalia equine_penis erection flaccid flared_penis genitals hooves kneeling male penis screw simple_background solo submissive submissive_male text mitokep equid equine horse mammal 1:1 2022 animated frame_by_frame short_playtime url|15307597655