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2013 anal anal_penetration anthro argon_vile balls comic dialogue dinosaur duo english_text erection foreskin from_behind_position genitals hi_res humanoid_genitalia humanoid_penis male male/male male_on_bottom male_on_top male_penetrated male_penetrating male_penetrating_male multiple_scenes nude on_bottom on_top ornithischian partially_retracted_foreskin penetration penis prehistoric_species reptile reverse_cowgirl_position saurischian scalie sex stegosaurian stegosaurus text theropod thyreophoran tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex