FURVERT!

anatomically_correct animal_genitalia animal_penis balls bodily_fluids canid canine canine_genitalia canine_penis canis detached_sheath digital_media_(artwork)domestic_dog erection feral fully_erect_inside_sheath genital_fluids genitals hi_res knot knot_in_sheath male mammal penis penis_tip precum sheath signature solo vein veiny_penis x-kid