We should look at our own culture, they did still doing all the things you have mentioned. Still some part of Nepal, dewar will marry bhauju which seems more logical to them. It does not abandon widow and always part of their family. In some culture there will be a single wife share by the all boys like Pandav did. Red neck break their virginity by their cousins and still marry cousins it's only in bramhin and khas who are following {(पुस्ता गन्ने"(was and is) a part of purifying race like Hitlar did )} counting the generation. Which has scientific reason. Nepsy you forgot the culture of Thakuri and Magar they still marry their cousins. You should not be bothered by Hunter who is banging his bhauju. If it was a rape case then you have the point.