Public Health Chief: there is no political will to stop sexualisation of girls Telegraph Wonder Women has been campaigning to bring sex and relationships education in the 21st century via its campaign, Better Sex Education, which now has more than 50,000 signatures. It is calling on Mr Cameron to update sex and relationship teaching material, last published in 2000 - some 13 years ago - and predating the internet as we know it. Mr Cameron backed the Telegraph Wonder Women campaign, in September, saying that sex and relationships education should be updated to reflect the "dangers" of internet porn. As did Mr Clegg. However, no such changes have been made yet. The Education Department insists that current guidelines are sufficient. Prof Ashton, speaking on LBC, stressed the importance of sex and relationships education. We should be regarding sexual and relationship education in school as important as maths and English - because this is about people embarking on their adult lives - and it's how they will live their lives for the next 60 years. At the moment they are getting really misleading information about sex from pornography. Parents need to demand better sex and relationship education in schools. He added: "Doing nothing is not acceptable. I think we have to do something [about the sexualisation of young people]. "We've got increasing rates of under 16"s pregnancy and sexually transmitted infections. We are letting our young people down. We are letting them be exploited commercially. People are making a lot of money out of sexualisation of children and young people. It seems politicians are not prepared to face up to this. Teacher and parent groups have backed Telegraph Wonder Women's campaign to make sure that lessons take into account of the rise of internet porn, sexting, sexual 'selfies' and the pressure for young people to document their lives and relationships online. Currently, there is no official guidance for teachers on how to talk about these difficult subjects to a group of teenagers. The Telegraph Wonder Women campaign to bring sex education into the 21st century has also been supported by groups and individuals including: the Girl Guides, Claire Perry - the Prime Minister's children's adviser, Tim Loughton - the Conservative MP and former Children's Minister, Dame Tessa Jowell - the Labour MP, Mumsnet, Professor Tanya Byron, the largest teachers' union - the National Union of Teachers, the National Association of Headteachers, teachers' union NASUWT, the Children's Commissioner - Dr Maggie Atkinson, the PSHE Association, the Sex Education Forum, and the Mother's Union. Telegraph Wonder Women is campaigning for better sex education, urging David Cameron to bring sex and relationships education into the 21st century. Sign our petition at change.org/bettersexeducation or email us at bettersexeducation@telegraph.co.uk. Follow the campaign on Twitter #bettersexeducation, @TeleWonderWomen