To Autolycus 3.6

And about lawless conduct, nearly all who have strayed in the chorus of philosophy are in agreement. First of all Plato, who is thought to have philosophized more nobly than the rest, in the first book of what he calls the Republic expressly lays down, in a way, that wives should be common to all. He uses the example of the son of Zeus, the lawgiver of the Cretans, so that on this pretext many children may be born of such unions, and, as he supposes, those who are grieving may be consoled by such intercourse. Epicurus too, besides teaching atheism, advises intercourse with mothers and sisters, even in defiance of the laws that forbid it. For Solon legislated clearly about this, that children should be born lawfully of a husband, so that those born would not be the offspring of adultery, and no one would honor as his father a man who was not his father, or dishonor his real father through not knowing that he was his father. And all the other laws, of the Romans and of the Greeks, forbid such things to be done. Why, then, do Epicurus and the Stoics teach incest and intercourse between males, filling whole libraries with such teachings, so that people learn lawless intercourse from childhood? And why should I spend more time on them, when they have proclaimed the same sort of things about those they call gods?