Can you point out where this practice is endorsed by the Koran?
You know, you pride yourself on being a writer and doing research, but you didn't even do the basics...
Let's look at these highlights from Wiki on the subject.
Bacha bazi - Wikipedia
Bacha bazi is a form of pederasty which has been prevalent in Central Asia since antiquity.[citation needed] A number of Western travellers through Central Asia have reported on the phenomenon of the bacchá. Visiting Turkestan in 1872 to 1873, Eugene Schuyler observed that, "here boys and youths specially trained take the place of the dancing-girls of other countries. The moral tone of the society of Central Asia is scarcely improved by the change". His opinion was that the dances "were by no means indecent, though they were often very lascivious." At this date there were already signs of official disapproval of the practice.
During the Afghan Civil War (1996–2001), bacha bazi apparently carried the death penalty under Taliban law.[11][12] The practice of dancing boys is illegal under Afghan law, being against Islam,[13] but the laws are seldom enforced against powerful offenders and police have reportedly been complicit in related crimes.[14][15]
So by your logic, the Taliban, the nuttiest of the nutty Muslims, banned the practice!
I should also point out that Ancient Greece, the founders of what we laughingly call "Western Civilization" had similar practices, or I could point out that the Catholic Church would castrate young boys so they would have high singing voices into adulthood.
Castrato - Wikipedia
In the 1720s and 1730s, at the height of the craze for these voices, it has been estimated that upwards of 4,000 boys were castrated annually in the service of art.[11]Many came from poor homes and were castrated by their parents in the hope that their child might be successful and lift them from poverty (this was the case with
Senesino). There are, though, records of some young boys asking to be operated on to preserve their voices (e.g.
Caffarelli, who was from a wealthy family: his grandmother gave him the income from two vineyards to pay for his studies
[12]). Caffarelli was also typical of many castrati in being famous for tantrums on and off-stage, and for amorous adventures with noble ladies.
[13] Some, as described by Casanova, preferred gentlemen (noble or otherwise).
[14] Only a small percentage of boys castrated to preserve their voices had successful careers on the operatic stage; the better "also-rans" sang in cathedral or church choirs, but because of their marked appearance and the ban on their marrying, there was little room for them in society outside a musical context.
[15]