Harry's indoctrination begins in earnest when he is sent to a special school who purpose is to train him to use his wizard powers safely, while still being able to live in a world full of muggles. Young students at this school are forbidden from practicing "magic" (i.e. homosexuality) outside of the school (this is the so-called "restriction on the use of underage magic"). They are also forbidden from using magic in the presence of muggles, who might be frightened or angered by witnessing it, an obvious and heavy handed commentary on gay-straight societal tension.
The students at this school are segregated by gender, a clear attempt to encourage homosexual relationships. The most popular pastime at the school is a game called "Quidditch", which involves riding hard shafts of wood, handling several types of balls, and trying to score points by successfully penetrating the hoop. This activity is enthusiastically endorsed by school officials for obvious reasons. Harry quickly excels at this new game and quickly becomes known for his above-average broom handling.