Not being at all familiar with Noahide I looked into it and found it has seven laws, which are:
1 Idolatry is forbidden. Man is commanded to believe in the One G-d alone and worship only Him.
2 Incestuous and adulterous relations are forbidden. Human beings are not sexual objects, nor is pleasure the ultimate goal of life.
3 Murder is forbidden. The life of a human being, formed in G-d's image, is sacred.
4 Cursing the name of G-d is forbidden. Besides honoring and respecting G-d, we learn from this precept that our speech must be ......sanctified, as that is the distinctive sign which separated man from the animals.
5 Theft is forbidden. The world is not ours to do with as we please.
6 Eating the flesh of a living animal is forbidden. This teaches us to be sensitive to cruelty to animals. (This was commanded to ......Noah for the first time along with the permission of eating meat. The rest were already given to Adam in the Garden of Eden.)
7 Mankind is commanded to establish courts of justice and a just social order to enforce the first six laws and enact any other ......useful laws or customs.
Looking into #2, Incestuous and adulterous relations, it says these are:
against (a man) having union with his mother
against (a man) having union with his sister
against (a man) having union with the wife of his father
against (a man) having union with another man's wife
against (a man) copulating with a beast
against a woman copulating with a beast
against (a man) lying carnally with a male
against (a man) lying carnally with his father
against (a man) lying carnally with his father's brother
against engaging in erotic conduct that may lead to a prohibited union
source
Interestingly enough, while this law does recognize women, it prohibits them from copulating with a beast, all the other relationships that are prohibited to men are open to women.
A woman is
not prohibited from
having union with her father
having union with her brother
having union with the husband of his wife
having union with another woman's husband
lying carnally with a female
lying carnally with her mother
lying carnally with her mother's sister
And while a man is prohibited from having union or lying carnally with his father and mother, fathers and mothers are not prohibited from having union or lying carnally with their children.
Kind of odd if you ask me.
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