As mentioned previously, homosexuality can be traced to nature. It’s not necessary that only the opposite gender feel sexual attraction. It is an important factor for procreation; however, same-sex relationships can be considered a grooming activity. Non-human primates, including apes, indulge in same-sex alliances, and these behaviours are certainly ancestral to hominids (NIH). Same-sex alliances provide appeasement, pacification, reinforcement of social dominance structures, juvenile play, social tolerance, stress reduction, and barter contraceptive benefits to primates.
Human society accepted such relations, and this can be found in the history of many civilizations. The Mesopotamian ancient religious text contains divine prayers for homosexual relationships (worldhistory.org). These sorts of alliances were formed for pedagogical purposes and birth control. The Celts also indulged in the free expression of homogeneity. All across the world, from China, Japan, Alaska, Africa, Europe, North America, and South America, these practices were recorded in early humans.
The indigenous community, however, has always been far more advanced than Western society, even in matters of free expression. Two-spirit people were embraced to perform some specific ceremonies; according to them, they were blessed and guided by the spirits in finally becoming their true selves. “Some terms speak directly to the idea of duality, as variations on “man-woman” (or “not-man-not-woman”), like the Crow bote and the Shoshoni tainna wa’ippe; others rely on elision and evocation, from the Navajo nádleehé (“one who is transformed”) to the Osage mixu’ga (“instructed by the moon”) to the Cherokee asegi udanto (“other heart”). (The New York Times).
To me, the reason they welcome such authenticity is because they understand the calling of the spirits. Being in nature certainly evolves one’s perception by acknowledging everything as it is and finding beauty in it.