FURVERT!

animal_genitalia animal_penis balls belly_slapping_masturbation big_flare black_knot black_penis bodily_fluids dripping equid equine equine_genitalia equine_penis erection fenn.perrox feral flared_penis fur genital_fluids genitals grey_body grey_fur hi_res horse knot male mammal medial_ring offset_balls penis precum precum_drip precum_string solo white_body white_fur