Look at the way the Titanic film was made, it is the reproduction of a great maritime disaster that happened in 20th C, yet its producers included a love-making scene which exposes the lust... Entertainment industry thrives on filling the movies with lust, greed and violence, which people copy later in their lives. Some of the high profile terrorist attack had its precedence in movies.
Legalizing pornography: Lower sex crime rates? Study carried out in Czech Republic shows results similar to those in Japan and Denmark
http://www.sciencedaily.com/releases/2010/11/101130111326.htm