Forget the 10 Commandments; these verses should be prominently displayed in Alabama courthouses!

No one is to approach any close relative to have sexual relations. I am the Lord. Do not dishonor your father by having sexual relations with your mother. She is your mother; do not have relations with her. Do not have sexual relations with your father's wife; that would dishonor your father. Do not have sexual relations with your sister, either your father's daughter or your mother's daughter, whether she was born in the same home or elsewhere. Do not have sexual relations with your son's daughter or your daughter's daughter; that would dishonor you. Do not have sexual relations with the daughter of your father's wife, born to your father; she is your sister. Do not have sexual relations with your father's sister; she is your father's close relative. Do not have sexual relations with your mother's sister, because she is your mother's close relative. Do not dishonor your father's brother by approaching his wife to have sexual relations; she is your aunt. Do not have sexual relations with your daughter-in-law. She is your son's wife; do not have relations with her. Do not have sexual relations with your brother's wife; that would dishonor your brother. Do not have sexual relations with both a woman and her daughter. Do not have sexual relations with either her son's daughter or her daughter's daughter; they are her close relatives. That is wickedness. Do not take your wife's sister as a rival wife and have sexual relations with her while your wife is living. Do not approach a woman to have sexual relations during the uncleanness of her monthly period. Do not have sexual relations with your neighbor's wife and defile yourself with her. Leviticus 18: 6-20

Incest is best.

"Last night I slept with my father. Let's get him to drink wine again tonight, and you go in and sleep with him so we can preserve our family line through our father." So they got their father to drink wine that night also, and the younger daughter went in and slept with him. Again he was not aware of it when she lay down or when she got up. Genesis 19:34-35

* You can almost hear the banjo music echo from the cave as Lot’s daughters rape him, perhaps a defiant act after he offered them to the horny mob.