Leviticus 18:9 clearly states not to have sex with your sister. Leviticus 18:12 takes this a step further: “You must not have sexual contact with your father’s sister; she is your father’s blood relative.” Clear as day. Don’t have sex with your father’s blood relatives.
Leviticus 20:17 states, “If a man marries his sister—his father’s daughter or his mother’s daughter—and they have sexual contact with each other, it is a disgrace. They will be cut off in the sight of their people. Such a man has had sexual contact with his sister; he will be liable to punishment.”
Leviticus 20:19 bans sex with your aunts and uncles.
And finally, as shown in the image above, Deuteronomy 27:22 reinforces the Levitical prohibition against incest.
But that’s not the practice we see in many parts of the bible. We already know that incest was necessary at least twice in the bible (Cain took a wife who was either his sister or Eve, and the flood left only one family standing; procreation had to have come from incest). But there’s more familial relations than just that.
Abraham’s brother, Nahor, married his own niece.
Lot’s daughters got him drunk so they could have sex with him and get preggers.
Abraham married his half sister (his father’s daughter).
Isaac married his cousin, and their son, Esau, married his cousin.
Amram married his aunt.
Amnon raped his half sister.
That’s a lot of incest. That’s like a Texas Chainsaw Massacre-level of incest. As shown in Leviticus 20, cases of incest are to be met with punishment, yet we only find punishment in the case of Amnon raping his sister. But that was an honor killing for rape, not incest. The rest of the bible shows a nonchalant acceptance of daddy doodling his daughters.
So why would a bible ban something that is inherent and widespread in the bible? Do as I say, not as I do?