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2016 abs anthro athletic biceps big_muscles biped bound canyne_khai claws digital_media_(artwork)dinosaur featureless_crotch glowing glowing_eyes hands_behind_back lying male muscular muscular_anthro muscular_male nude on_back pecs prehistoric_species red_eyes reptile saurischian scalie sharp_teeth simple_background solo spread_legs spreading submissive submissive_male teeth theropod thick_thighs toe_claws tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex upside_down