Teachers have been given the green light to talk frankly about sex in an attempt to educate increasingly promiscuous students and stem the rise in teenage pregnancies.
Few like to admit it, but Thai pupils are experimenting with sex at younger and younger ages.
For years parents have considered sex a dirty word, leaving it to teachers to explain or letting youngsters turn to pornographic magazines and videos.
But schools have done little more than shyly explain the value of birth control and how reproduction works.
The approach has failed. Thai teenagers, fed on a culture of pop-music videos, soap opera relationships and girlie teen magazines, no longer value virginity before marriage.
The fear of Aids has driven many curious teenage boys away from massage parlours to classmates who are considered cleaner.
In turn, many female students have turned to prostitution to support expensive tastes in mobile phones and designer clothes.
