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2013 3_toes animal_genitalia anthro biceps biped black_hair circumcised claws digitigrade dinosaur dromaeosaurid erection fangs feet flexing genital_slit genitals grin hair hand_behind_head humanoid_genitalia humanoid_penis legs_up looking_at_viewer lying male markings muscular muscular_anthro muscular_male nude on_back pecs penis pose prehistoric_species presenting raised_leg reptile saurischian scales scalie simple_background smile solo spread_legs spreading tail teeth thegreatmatsutzu theropod toe_claws toes velociraptor wings yellow_eyes