Views on Nod.

The oddly famous biblical country named "Nod" predated the great flood in human history, assuming mankind was created in the same time spawn as the remainder of the world.
It is written that Nod's first inhabitant was CAIN, who's a second generation human (i.e. Adam's first bon).

Cain was put at a disadvantage compared to his younger brother, Seth, cause he's doomed to venture away and tread the earth's surface, and survive on his own.
Nod, due to its name (meaning "errancy") is being suggested as a place where few trees grow and animals live, indeed possibly none at all, and there is just dry, rigid soil and sand. In sum: a wasteland.
What, then, brought CAIN to build a city in Nod, naming it with his son's name, Enok?
The answer is, from my viewpoint, there was a lot of place to build homes in Nod.

It is not told, in the Bible, who were Cain's younger sisters and how many daughters Adam had past CAIN and Seth.
But Adam and Eve definitely had many girls at that time: considering the absence of guilt in Cain's character, it is likely that this man kidnapped his youngest sister at one point in history and brought her with him to Nod.
(Indeed, this is likelier than the eventuality Cain had sex with his own mom, for he was not living in the same country as her).

Cain's sister would have becomed the world's first prostitute for she was abused by Cain and wanted him to pay for her rapture.
That led to a heritage of women who thought in a dishonest, seductive way and used artifice to get men.
They however could be very beautiful, which is why Seth's and Cain's lineages unavoidably crossed, leading to one single heritage: that of Noah.