Someone has been watching Little Big Man.
Yes, I am aware of the "twin soul" thing that that one tribe was talking about, and if there is any historical truth to it, then I would say it was a VERY isolated practice.
I'm sure if we had all records of history we may find accounts all over the world where this might have occurred at some time, but we have no records that suggest it was a cultural norm until the present, after Freud, after Wilhelm Reich wrote The Sexual Revolution, after the establishment of the Frankfurt school and critical theory here in the west, after the influence of Herbert Marcuse, post modernism, etc., after Alfred Kinsey wrote his two books on male and female sexuality and made it on the cover of all the popular magazines at the time, and after the medical books on mental health were changed, not by scientific findings, but by force and bullying tactics.
You forget that you and your like subscribe to a secular religion, and your not even familiar with it's authors, what they were like, and what motivated them. In fact half of the heroes of the pride movement were in fact pro pedo.