A NATIONAL charity has called on the government to make sex education compulsory in primary and secondary schools.

The Family Planning Association has published a study examining attitudes of young people and adults towards sex, families and relationships.

According to the charity the results fly in the face of the stereotypical image of young people being reckless about sex.

It revealed a generation of thoughtful young people who understand the importance of taking responsibility for sexual health.

More than 90 per cent of 18 to 24 year-olds said their relationship with their family is the most important of their life.

Ian Hill, Swindon secretary of the National Union of Teachers, said: "Schools are already expected to give personal and social education, with parents having the right to opt out.

"Obviously the appropriate age for discussing certain things is a matter for discussion.

"The NUT believes sex education is an important part of children's education.

"But at the moment a teacher has the right to opt out, and I think we would want that right to remain.

"Catholic teachers, for example, would have some difficulty with various aspects of birth control."

Mr Hill said he agreed with the survey's findings about children being more responsible than stereotypes suggest.

He said: "Children are far more astute and worldly wise than some people give them credit for."