FURVERT!

absurd_res accipitrid accipitriform animal_genitalia animal_penis anthro aquatic avian balls balls_blush big_balls big_penis bird black_penis blush body_blush body_hair canid canine canine_genitalia canine_penis canis chart columbid comparing dobermann domestic_dog equine_genitalia equine_penis erection fish foreskin genitals gradient_penis group gynomorph hairy_balls hare hi_res humanoid_genitalia humanoid_penis hybrid intersex knot lagomorph leporid machine male mammal parrot penis penis_chart penis_lineup penis_size_difference pigeon pink_penis pinscher procyonid raccoon red_penis robot rodent sciurid shark sheath size_chart small_penis tapering_penis thick_penis tree_squirrel undercover_bluejay vein veiny_penis