To honor him by preserving his seed so the family could have legacy. Later in the the scripture we find out that Ruth was a descendant of lot.
That includes relations between cousins. Also uncle nice.
Looks like in NY York state they allowed a Half Uncle/half niece to Marry each other.
/http://www.washingtonpost.com/news/volokh-conspiracy/wp/2014/10/30/half-unclehalf-niece-marriages-are-valid-under-n-y-law
Scripture about restrictions with relatives.
http://biblehub.com/kjv/leviticus/18.htm
6None of you shall approach to any that is near of kin to him, to uncover their nakedness: I am the LORD.
7The nakedness of thy father, or the nakedness of thy mother, shalt thou not uncover: she is thy mother; thou shalt not uncover her nakedness.
8The nakedness of thy father's wife shalt thou not uncover: it is thy father's nakedness.
9The nakedness of thy sister, the daughter of thy father, or daughter of thy mother, whether she be born at home, or born abroad, even their nakedness thou shalt not uncover.
10The nakedness of thy son's daughter, or of thy daughter's daughter, even their nakedness thou shalt not uncover: for theirs is thine own nakedness.
11The nakedness of thy father's wife's daughter, begotten of thy father, she is thy sister, thou shalt not uncover her nakedness.
12Thou shalt not uncover the nakedness of thy father's sister: she is thy father's near kinswoman.
13Thou shalt not uncover the nakedness of thy mother's sister: for she is thy mother's near kinswoman.
14Thou shalt not uncover the nakedness of thy father's brother, thou shalt not approach to his wife: she is thine aunt. 15Thou shalt not uncover the nakedness of thy daughter in law: she is thy son's wife; thou shalt not uncover her nakedness.
16Thou shalt not uncover the nakedness of thy brother's wife: it is thy brother's nakedness.
17Thou shalt not uncover the nakedness of a woman and her daughter, neither shalt thou take her son's daughter, or her daughter's daughter, to uncover her nakedness; for they are her near kinswomen: it is wickedness. 18Neither shalt thou take a wife to her sister, to vex her, to uncover her nakedness, beside the other in her life time.
To honor him by preserving his seed so the family could have legacy. Later in the the scripture we find out that Ruth was a descendant of lot.
...by the horndogs of Sodom. The men wanted to have gay sex with two angels who were guests of Lot, but being a good host, Lot offered his virginal daughters instead.
That sounds like a Meet & Greet I went to.
Don't they sound a lot like the Modern day Mormons? Well except for the drunkenness of course, we all know how they feel about wine, coffee, etc, but fucking your daughter doesn't seem to be high on their "don't do this" list.
As for Lot, virgins aren't exactly my first choice, but even a virgin beats anyone with a dick, although it appears that Hadji might disagree with that sentiment.
It all started with Adam's and Eve's sons and daughters. Which were brothers and sisters. If they didn't have any girls. Then the boys impregnated their mother. If they didn't have any boys then the girls got pregnant by Adam.
It's very simple really if you believe. The invisible daddy in the sky can do, redo, undo, contradict and make no sense at all because after all
HE iS GOD!!!!!!!!!!!!!!!!!!!!
Now what you measly mortal gonna do about it?
I want to but I won't ha, ha. Hard to resist though. If your inlaw niece 18 years or older (non blood relative) made a pass to you would you follow up and pursue her for some fun on the side ? What about one of your first cousins ?