FURVERT!

1:1 a_box alpha_channel animal_genitalia animal_penis black_body black_fur bodily_fluids border_collie canid canine canine_genitalia canine_penis canis collie cum domestic_dog erection eyes_closed feral fur genital_fluids genitals herding_dog knot male mammal pastoral_dog penis red_penis sheepdog solo tongue tongue_out white_body white_fur