author nancy jo sales.t are the challenges that american girls are facing today that are different from the ones they've always faced? >> girls use social media a lot- - they're on their phones a lot- - and i think most parents are question is what is happening there and how are these some regrettable trends that we've seen happening for some time. just the sexualization of girls, the bullying, how are these moving on to phones and on to screens and what is this environment doing to the lives of girls and boys? >> sreenivasan: you paint a picture almost of these young girls at this kind of intersection of the existing angst that a teenage girl has combined with this technological leap that we're all taking together combined with pornography. >> yeah, i think the kind of elephant, maybe dinosaur in the room, right now is pornography. pornography has been available online for some time, but i don't think we've really begun to have a conversation about what that is doing to kids. and we know that they're watch