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1:1 ambiguous_gender animal_genitalia animal_penis anthro balls blush border_collie canid canine canine_genitalia canine_penis canis collie domestic_dog duo eye_contact fellatio female femboy fox fur genitals herding_dog hi_res knot licking looking_at_another male male/ambiguous mammal moan oral pastoral_dog paws penile penis sex sheepdog shy skibaparker snout tongue