Be clear about sex: the results of the sexual health lifestyle & co-creation campaign. On November 1, 2010, the youth campaign ‘Be clear about sex’ was started in the Netherlands. 17% of girls and 4% of boys experienced sexual transgressive behaviour, with consequences like anxiety, anger, shame, self-blame and distrust. The campaign aimed to prevent sexual transgressive behavior between young people between 12 and 18 years. STI AIDS Netherlands and Rutgers WPF developed the campaign on behalf of the Ministries of Health and Education. In 2014, a co creation part started, in which young youtube artists involved (a number of) young people. Central part of the campaign is a book with six short stories about sexuality written by Dutch youth writers. The stories are read by students (secondary education) during Dutch lessons. The book deals with issues that concern young people such as sending a nude picture, have never kissed, peer pressure to do ‘it’, dealing with strict parents and are in love with someone of the same sex. For more impact, the stories were also filmed. Under the guidance of professional filmmakers six teams of young filmmakers filmed the book in 30 days. The campaign was successful. In two weeks, 850 schools ordered 125.000 books. The six short movies got more than 200.000 views on YouTube.Gover.