Histories

To Dionysus, on the evening of his festival, everyone offers a piglet which he kills before his door and then gives to the swineherd who has sold it, for him to take away.

The rest of the festival of Dionysus is observed by the Egyptians much as it is by the Greeks, except for the dances; but in place of the phallus, they have invented the use of puppets two feet high moved by strings, the male member nodding and nearly as big as the rest of the body, which are carried about the villages by women; a flute-player goes ahead, the women follow behind singing of Dionysus.

Why the male member is so large and is the only part of the body that moves, there is a sacred legend that explains.