The Family Planning Association has introduced a new book to address questions about relationships and changes during puberty.

Chau Wai-wai, an education officer from the association, on Wednesday said the book covers various topics including body image, sexual orientation and sexual identities.

"When we are addressing body image, when we are addressing bodily changes, when we are addressing sexual desire, we try to make it positive. It's part of life, it's part of growing up," she said.

Hong Kong's sex education came under the spotlight recently when officials released a set of teaching materials suggesting that rather than acting upon sexual impulses, young people should consider going to play badminton instead.

Critics said the advice was “out of touch”, but the Education Bureau said the materials aim to teach pupils how to protect themselves.

Chau said she wants to see more comprehensive sex education in the school curriculum.

“Hong Kong is a stressful society. Also in schools, teaching time is very limited. In that case, sex education is squeezed into different subjects,” she said.

“So there's no independent subject or not even compulsory in the curriculum. In that sense, of course, we would like to see sex education included more in the curriculum.”