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4:5 anthro anus black_body black_fur black_nose bodily_fluids breasts canid canine canis comic cum cum_in_uterus cum_in_vagina cum_inside cutaway dobie_gray domestic_dog duo female female_penetrated foreskin fur genital_fluids genitals hi_res internal internal_vaginal larger_female larger_penetrated male male/female male_penetrating male_penetrating_female mammal mature_anthro mature_female nipples nude partially_retracted_foreskin penetration penile penile_penetration penis penis_in_vagina sex size_difference smaller_male uterus vaginal vaginal_fluids vaginal_fluids_on_penis vaginal_penetration wbnsfwfactory willy_(ohs688)