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aaron_(caldariequine)anal anal_penetration animal_genitalia anthro anus beak black_beak bodily_fluids ceratopsian ceratopsid chasmosaurine connor_(caldariequine)deer dinosaur dominant duo erection genital_fluids genital_slit genitals horn knot larger_anthro larger_dom male male/male male_penetrated male_penetrating male_penetrating_male mammal marginocephalian moose new_world_deer open_beak open_mouth ornithischian penetration penis precum prehistoric_species reptile scalie sepiaflux sex size_difference smaller_anthro spread_legs spreading tail tongue tongue_out triceratops vein