@Doomroar
As far as I figured, sanguineous relationships don't immediately mean "their child gonna be fucked". It should take a few generations to really hammer in the recessive genes that just keep on being inherited.
That being said, they don't even need kids. They can just...Ya'know, do butt stuff. :v
@SSJR2
I don't think it's wrong to say: "
I saw a lot of "X" within media "Y", which is produced in Japan / America / Europe! Something's up!"
For an instance, a lot of American TV have racism as their central theme, or make sure to drop a few episodes on it. It's in their culture to talk about racism.
And when you see so much incest porn in anime, it makes you wonder what is up with Japanese culture that has them write about it. But honestly, I also don't really care about incest anymore. I also don't pay much attention to it.
@alidan
More on pornhub stuff....I genuinely believe like "bro x sis" porn is an inevitable genre. It's just so easy to write, for any of those who want to have a "story line", that you don't even need to be a good writer in order to sell the idea of: "why would these two be fucking."
How did they meet? They live in the same house. How close are they? They live in the same house. They are family. How did they come to fucking? Not necessary to answer, but: they are a man and a woman, who live in the same house. Add in a lil' spice of: "gotta hide from the parents", and you got that forbidden fruit going on in there. It practically sells itself.