Rule 34 Dev - 2018 anthro anus ass balls chumbasket clothed clothing dinosaur foreskin grey_background grey_scales hand_on_butt jockstrap looking_at_viewer looking_back male male_only muscular muscular_male partially_clothed partially_retracted_foreskin penis presenting presenting_anus presenting_hindquarters raised_tail scales simple_background sitting solo teeth theropod tyrannosaurus_rex uncut underwear yellow_eyes|3023981696