Rule34https://rule34.xxx/index.php?page=atom&tags=2017 anatomically correct anatomically correct anus anatomically correct penis animal genitalia animal penis anthro anus ass backsack balls biped black anus black balls black penis digitigrade dock dripping equine equine penis erection full-length portrait greyscale guide lines hi res hooves horse horsecock kneeling long penis looking back male male only mammal mane monochrome nude oouna penis perineum portrait precum presenting presenting hindquarters puffy anus raised tail rear view shadow simple background sketch solo white background2024-05-06T21:17:26ZRule34