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animal_genitalia animal_penis anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro bite canid canine canine_genitalia canine_penis canis dominant dominant_male genitals group guncht knot larger_male male male/male male_penetrated male_penetrating male_penetrating_male mammal penetration penis sex shoulder_bite size_difference smaller_male smile submissive submissive_male travis_(rotgut12)trio wolf