FURVERT!

anatomically_correct anatomically_correct_genitalia anatomically_correct_penis animal_genitalia animal_penis anthro backsack balls bent_over big_butt black_body black_fur bodily_fluids brown_body brown_fur butt canid canine canine_genitalia canine_penis canis countershade_butt countershading domestic_dog erection fur genital_fluids genitals knot male mammal mastiff molosser pawpads paws penis perineum precum presenting presenting_hindquarters rear_view rottweiler simple_background solo teewhup