For this reason too I have condemned the legislation among you. For there ought to have been one common polity for all; but as it is, there are as many enactments of laws as there are kinds of cities, so that things shameful among some are esteemed among others. The Greeks, at any rate, consider intercourse with one's mother to be a thing to be shunned, but among the Persian Magi such a practice is held most noble; and pederasty is prosecuted by the barbarians, but is deemed worthy of privileges by the Romans, who attempt to gather herds of boys like grazing horses.