Board Thread:Theories and Speculation/@comment-995176-20161007184843

In the filler we know that they do happen. Why didn't Madara and Hashirama Senju ever arrange such a marriage say between Princess Tsunade and Fugaku Uchiha? Those were just hypotheticals of course (im not shipping) just saying having a arranged Marriage would have been a whole lot easier to produce a offspring with both Uchiha and Senju genetics instead of Madara stealing Hashirama's DNA and mass producing it in random clones. I know that Naruto is based off of Japanese Culture and back in the Feudal era warring clans would often have arranged marriages to prevent fighting and seal the deal once kids were produced. The Rinnegan would be Natural then instead of artificially implanted. 