FURVERT!

animal_genitalia animal_penis anthro anus balls bestiality big_balls big_butt bridle butt duo equid equine equine_genitalia equine_penis eyewear fellatio feral feral_transformation fur genitals glasses grey_body grey_fur hooves horse human human_to_feral male male/male mammal medial_ring mid_transformation oral penile penis puffy_anus reins sex species_transformation transformation transformation_through_sex yanzer