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Sex education 'must counter porn'

24 May 2013 Last updated at 07:43 BST

In an age when "extremely violent and sadistic imagery is two clicks away", school sex education is struggling to keep pace, a study suggests.

Relationship and sex education should be compulsory in all schools and include time for pupils to discuss the impact of pornography say the authors.

Lessons on relationships should start in primary school, said deputy children's commissioner Sue Berelowitz.

Reeta Chakrabarti reports.