Why has badminton become a code for sex in Hong Kong?

For some people it was also about the practicalities.

MP Doreen Kong said the documents showed that the education bureau did not understand young people. She specifically criticised the badminton suggestion as unrealistic.

“How could they borrow a badminton racket on the spot if it happens?” She asked.

To Thomas Tang, who is an amateur badminton player, the jokes and sudden increased interest in the sport have made it slightly embarrassing for players like him.

“In the past this was just a healthy sport, but now if you ask people to play badminton they make a lot of jokes,” he said, adding that the irony was that badminton was actually a good way for guys to meet girls.

The Education Bureau documents also told teachers that one of the objectives of the module was to help students master ways of coping with sexual fantasies and impulses, and the module was not created to encourage them to start dating or engaging in sexual behaviour.

Some suggested discussion activities in the documents include advising students to “dress appropriately to present a healthy image and to avoid visual stimulation from sexy clothing”, and “firmly refuse sex before marriage” if they are unable to cope with the “consequences of premarital sex”.

Education Secretary Christine Choi has stood firm in the face of all the criticism.

“We wish to protect the teenagers,” she said while defending the documents in an interview on Sunday, adding that it is illegal to have sex with an underage person.

She has received support from the city’s leader John Lee, who said that while there could be different opinions on education, the government plays a “leading role in determining the kind of society it aims to build”.

But to Henry Chan, a father of a 13-year-old girl and 10-year-old boy, these efforts are ridiculous.

“The Hong Kong government is always out of touch. They are making a fool of themselves,” he said.

“My wife and I will probably do that [sex education] ourselves. That’s not something I would count on schools and the government to do.”