FURVERT!

2016 2:1 absurd_res animal_genitalia animal_penis balls black_balls black_body black_fur black_sheath canid canine canine_genitalia canine_penis canis domestic_dog duo equid equine equine_balls equine_genitalia equine_penis equine_tail erection eyes_closed feral feral_on_feral french_kissing fur genitals great_dane grey_background half-erect hi_res hooves horse interspecies kissing knot knot_in_sheath male male/male mammal mastiff molosser penis penis_size_difference quadruped sheath side_view simple_background size_difference standing tail virtyalfobo white_body white_fur