rule 34 1768 18th century anatomically correct anatomically correct genitalia anatomically correct penis ancient art animal genitalia animal penis arabic text balls bridle equid equine equine genitalia equine penis feral formal art fully sheathed fur genitals green background halter hooves male mammal mane penis public domain quadruped saddle blanket sheath side view simple background snout solo tail text traditional media artwork unknown artist white body white fur 9021464