"The sooner the better" is a very ambiguous and rude expression. Is it better to teach condoms as early as possible? It's better to teach you how to know your physical changes as soon as possible. This question itself is very rough, which is also a very common phenomenon (because everyone thinks of things that children should not know in traditional culture), so when answering this question, we need to insist on one word: school age.
What is the appropriate age? It is a complete education system to teach the corresponding knowledge and attitude at the corresponding age, just like learning Pinyin in the first grade Chinese class in primary school and writing argumentative essays in the high school Chinese class, which has different contents and methods for different age groups.
On the issue of sex education, firstly, we recommend the 20 18 version of the Outline of International Educational Technology compiled by UNESCO (the revised Chinese version has been published since this answer was issued). If necessary, we can refer to the 20 10 version to obtain the Chinese version.
In the 20 18 version of the guide, the appropriate age group for receiving sex education is divided into four sections: 5-8 years old (middle childhood), 9- 12 years old (late childhood), 12- 15 years old (adolescence) and15 years old.
According to different age groups, set learning goals reasonably in stages.
For learners of different ages, the knowledge they receive should match their cognitive ability, and at the same time, people with mental retardation and learning disabilities should be included in the learning system.