FURVERT!

all_fours animal_genitalia animal_penis balls big_penis black_body black_fur black_hair blush bodily_fluids bottomwear boxers_(clothing)brown_hair bukefalos06 butt clothing cum cumshot ejaculation equid equine equine_genitalia equine_penis expansion eyes_closed feral feral_transformation fur genital_expansion genital_fluids genitals growth hair half-erect hands-free hooves horse huge_penis human_to_feral husdingo kneeling looking_back male mammal mane nipples open_mouth pants penis penis_expansion simple_background solo species_transformation spontaneous_ejaculation tail tail_growth tan_body tan_skin torn_clothing transformation underwear