Question: How were young boys of nobility initiated into manhood?
About the article "Machu Picchu", section "Intimachay and the Royal Feast of the Sun".

Candidate passages:
In the early days of human civilizaton, as proven by several indigenous and aboriginal tribes, boys, along with other children, lived in women's spaces till they reached puberty, after which they generally had to undergo 'manhood tests' or 'rites of passage into manhood' in order to be initiated into men's spaces.
The manhood tests became more and more torturous with time during which men were expected not to show the slightest sign of pain or sighcultures?
gross overgeneralisation.
Boys who failed these tests were denied membership of men's spaces, which amounted to denying manhood and being emasculated, and were isolated as one of the third genders, deprived of social rights and privileges available to 'men.'
This was a fate worse than death for masculine gendered males.
The feminine gendered males, i.e.
the third genders were in some tribes exempt from manhood tests and were raised as third genders from early childhood, when they showed what is today known as "Gender incongruent behaviour.
"In what are considered modern civilizations, it is still of great importance to be counted as one of the men.
It can even be a matter of life and death for masculine gendered males.
- and to be isolated as a 'third gender' remains severely stigmatizing for masculine gendered males. 
Intimachay is a special cave designed to celebrate and observe the Royal Feast of the Sun.
This festival was only to be celebrated by nobility in the Incan month of Capac Raymi and was associated with the December solstice.
The festival would begin earlier in the month and would conclude on the solstice.
On this day, boys of nobility would be initiated into manhood by conducting an ear-piercing ritual as they watched the sun rise from within the cave.
Architecturally, Intimachay is the most significant structure located at Machu Picchu.
Its entrances, walls, steps and windows are all comprised with some of the finest masonry found in Incan Empire.
The cave also includes a unique tunnel-like window which cannot be found in any other Incan structure.
This window was strategically constructed to only allow sunlight into the cave for a span of several days around the time of the December solstice.
For this reason, the cave was inaccessible for much of the year.
Intimachay is located on the eastern side of Machu Picchu, just north of the "Condor Stone."
Many of the caves surrounding this area were prehistorically used as tombs, yet there is no evidence to suggest that it too was a burial ground.
Ballantyne felt that the old saying "boys will be boys" was not correct.
Instead, he believed that boys must be trained up from boys to be true men and not just left on their own "to be boys".
He said:Ballantyne also believed in firm manly friendships in boys.
He knew how important it is for boys to have good wholesome friends.
In almost all his books, he sets his characters around other young men or even older men who speak into their lives. 
The Baiame myth tells how Baiame came down from the sky to the land, and created rivers, mountains, and forests.
He then gave the people their laws of life, traditions, songs, and culture.
He also created the first initiation site.
This is known as a bora; a place where boys were initiated into manhood.
When he had finished, he returned to the sky, and people called him the "Sky Hero" or "All Father" or "Sky Father".
He is said to be married to Birrahgnooloo (Birran-gnulu), who is often identified as an emu, and with whom he has a son Daramulum (Dharramalan).
In other stories Daramulum is said to be brother to Baiame.
It was forbidden to mention or talk about the name of Baiame publicly.
Women were not allowed to see drawings of Baiame nor approach Baiame sites—which are often male initiation sites (boras).
In rock paintings Baiame is often depicted as a human figure with a large head-dress or hairstyle, with lines of footsteps nearby.
He is always painted in front view; Daramulum is drawn in profile.
Baiame is often shown with internal decorations such as waistbands, vertical lines running down the body, bands and dots.
The dots are said to have given him power over smallpox. 
Kamilaroi mythology includes Baiame, the ancestor or patron god.
The Baiame myth tells how Baiame came down from the sky to the land, and created rivers, mountains, and forests.
He then gave the people their laws of life, traditions, songs, and culture.
He also created the first initiation site.
This is known as a bora; a place where boys were initiated into manhood.
When he had finished, he returned to the sky, and people called him the Sky Hero or All Father or Sky Father.
He is said to be married to Birrahgnooloo (Birran-gnulu), who is often identified as an emu, and with whom he has a son Daramulum (Dharramalan).
In other stories Daramulum is said to be brother to Baiame.
It was forbidden to mention or talk about the name of Baiame publicly.
Women were not allowed to see drawings of Baiame nor approach Baiame sites, which are often male initiation sites (boras).
In rock paintings Baiame is often depicted as a human figure with a large head-dress or hairstyle, with lines of footsteps nearby.
He is always painted in front view; Daramulum is drawn in profile.
Baiame is often shown with internal decorations such as waistbands, vertical lines running down the body, bands and dots.