Rule 34 Dev - 2008 32boys animal_penis armadillo artist_name artist_website avian balls ballsack bat bear bovine canine cervine cetacean chart chinchilla comparison crocodile deer diphallia diphallism disembodied_penis dolphin echidna educational elephant equine erection feline feral foreskin foreskin_folds fossa giraffe glans glider haplorhine hemipenes horsecock human humanoid_penis hyena intact kangaroo knot lizard male male_only male_pubic_hair marine marsupial monkey multi_penis mythological partial_male penis penis_chart penis_comparison penis_focus penis_only penis_size_chart penis_size_comparison penis_size_comparison_meme penis_size_difference pig porcine primate raccoon reference_image reference_sheet reptile retracted_foreskin rhino rodent scalie scrotum seal sheath small_penis smooth_penis snake tapering_penis tapir testicles text turtle ultraviolet_(artist) uncut unretracted_foreskin|661253024