FURVERT!

1:1 ambiguous_species anal anal_penetration animal_genitalia animal_penis blush bodily_fluids canid canine canine_genitalia canine_penis canis cold-blooded-twilight domestic_dog duo female feral genital_fluids genitals hanna-barbera hi_res knot knotted_penis male male/female mammal penetration penis saliva scooby-doo scooby-doo_(series)size_difference steamy_breath tongue tongue_out vaginal_fluids vein veiny_penis