FURVERT!

2:3 absurd_res alligator alligatorid anatid anatid_penis animal_genitalia animal_penis anseriform anthro antlers avian balls bear bestiality big_balls bird black_and_white bovid bovine canid canine canis cattle cervine_genitalia cervine_penis comic crocodilian curly deer domestic_dog domestic_pig duck equid equine equine_genitalia equine_penis erection felid feral genitals hi_res horn horse knot male mammal monochrome nude penis porcine_penis reptile scalie sketch spiral_penis suid suine sus_(pig)tapir unusual_anatomy unusual_genitalia unusual_penis