It's interesting to see a major media source noticing the increase in the cases of teenagers taking nude cell phone pictures and being prosecuted for serious charges:
Earlier this year, an Ohio boy reportedly made a sexual cell phone video of himself and sent it to female classmates, one of whom then forwarded the video to at least 30 other people. Similar incidents have been reported in Wyoming, New York and Pennsylvania.
"They don't understand the global nature and extent of the Internet, and how easy it is once you posted something, even if you think it's private, could become public very quickly," said John Grohol, a psychologist and publisher of PsychCentral.com.
Such incidents are a symptom of a culture where sexual imagery like the infamous photo of Britney Spears' exposed crotch or Vanity Fair's seminude photos of 15-year-old "Hannah Montana" star Miley Cyrus have become the norm, said Jean Kilbourne, author of "So Sexy, So Soon: The New Sexualized Childhood and What Parents Can Do to Protect Their Kids."
I think the article overstates the role of modern culture in sexualizing youth. I think the more likely explanation is simply the changes in technology. Kids have access to tools to record what previously occurred in private environments.