Board Thread:Theories and Speculation/@comment-26138683-20150322132758/@comment-25549954-20150323093220

I assume yin and yang are spiritual and physical energies respectively, so it comes down to "everyone has yin and yang because basically everyone has chakra (spiritual and physical energies)". But there is one problem and that is, not everyone has Yin and Yang nature release and other natures in the databook. I assume everyone has yin and yang but not the ability to release it so that is why I assume they lack those nature release, if they are touched by Hagoromo they unlock the ability to use yin-yang release. I have a theory that chakra is yin and yang (ratio can vary) and when it mixes with one of the elemental natures in the body it becomes fire release, water release etc. for e.g.: Rasengan a pure chakra (which I belive is yin and yang chakra) when mixed with wind element becomes Wind release: Rasengan. When Madara explained about Ninjutsu we can see yin and yang symbol and some humans expelling fire, water so I think yin and yang have some contribution in elemental nature release. I think Kishimoto took this idea of five elements from religion probably Buddhism and Hinduism or some Japanese Philosophy-Five elements (Japanese philosophy), people believed that body is made up of 5 elements. I believe everyone has 5 elements + yin-yang life force in narutoverse but not everyone has the ability to mix elements with chakra to release fire release water release etc. or release pure yin, pure yang for their advantage only few have those ability like Nara clan and Akimichi clan. Tayuya probably has the ability to release pure yin or containing more of yin and less of yang. Genjutsu falls under yin release so it has more of yin released from the eyes or whatever.