FURVERT!

abdominal_bulge animal_genitalia animal_penis balls big_balls big_penis canine_genitalia canine_penis causationcorrelation duo eeveelution equid equine erection feral generation_2_pokemon genitals horse huge_balls huge_penis hyper hyper_balls hyper_genitalia hyper_penis internal knot male mammal nintendo penis pokemon pokemon_(species)quasarbre simple_background size_difference small_but_hung umbreon