FURVERT!

anal_fluids anthro anus backsack balls big_balls big_butt big_penis biped bodily_fluids butt butt_focus claws countershade_tail countershading dinosaur erection genitals glans hi_res huge_balls huge_penis humanoid_genitalia humanoid_penis larathen larathen_(character)letterbox male non-mammal_balls penis perineum prehistoric_species puffy_anus rear_view reptile saurischian scalie scrotum_flap solo tail theropod tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex vein veiny_penis