FURVERT!

3_toes all_fours allandox anthro anus balls butt canid canine claws dinosaur duo erection feet foot_focus foreskin fox genitals glans humanoid_genitalia humanoid_penis imminent_sex larger_sub macro male male/male mammal micro nude penis penis_size_difference perineum prehistoric_species reptile saurischian scalie size_difference standing submissive theropod toe_claws toes tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex