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2:3 anthro balls bed bed_covers bedding dinosaur erection eyrich foreskin furniture genitals greyscale hi_res horn humanoid_genitalia humanoid_penis looking_at_viewer male manly monochrome morning_wood muscular muscular_anthro muscular_male non-mammal_balls nude partially_retracted_foreskin penis prehistoric_species reptile saurischian scalie shaded sketch smile soft_shading solo theropod traditional_media_(artwork)tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex