There are many different stories about sexual costumes in Thailand, but this one seems to be exagerated.
The notice is from BBC (photo and article) and here is the video that unfortunatelly is unpossible to embed in the blog.
One scool invented a special toilet for transsexual puples. Boys don't accept them, girls don't accept them, but there are always about 10-20% of puples that at 12-17 years of age just declare themselves as transsexuals.
I learned the story of transsexuals and acceptance of them in the human history about a year ago. It was said, between all, that it was normal use in poor families to educate beautiful boys as females to sell them later to rich men and to facilitate their life as adults.
I asked the headmaster whether they were not too young to be making decisions about their gender.
He said that, in his 35 years of working in the Thai education system, he had come across many boys like this, and they never changed. Many go on as adults to have sex-change surgery, while others will live as gay men, he said.
Here is the first sentence from this article:
It (this school) is situated in Thailand's impoverished north-east, and most of the pupils are the children of farmers.Maybe THIS is the reason of this strange enormous number of boys making this not less strange decision at this age?