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anal anal_penetration anthro balls butt canid canine dinosaur duo fox genitals hi_res humanoid_genitalia humanoid_penis male male/male male_penetrated male_penetrating male_penetrating_male mammal muscular muscular_anthro muscular_male penetration penis prehistoric_species red_body reptile saurischian scalie sex sharing_clothing silvius_(draethon)theropod tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex zoma zomacaius