Board Thread:Theories and Speculation/@comment-1512913-20161119171442/@comment-25122992-20161204163222

Technically, the eyes don't even seem to be the source of Susanoo. I mean, all the other MS techniques require chakra concentration in the particular eye to perform, while Susanoo is manifested rather via chakra release from the body itself, it's even possible that MS is just something that gives this chakra the proper form of a warrior.