 They are mentioned several times in Aristophanes' comedy of 411 BCE, "Lysistrata".Herodas' short comic play, "Mime VI", written in the 3rd Century BCE, is about a woman called Metro, anxious to discover from a friend where she recently acquired a dildo.She eventually discovers the maker to be a man called Kerdon, who hides his trade by the front of being a cobbler, and leaves to seek him out.