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anthro balls black_and_white crouching dinosaur flaccid foreskin genitals humanoid_genitalia humanoid_penis larathen line_art looking_at_viewer male monochrome muscular muscular_anthro muscular_male non-mammal_balls nude penis prehistoric_species reptile saurischian scalie solo tail tattoo theropod tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex