Parent reviews for Impulse

I just don't understand why you would have all the swearing in this book as well as the graphic sex that is talked about. Why is this book targeted for 16 year old's? It has made it's way into a Jr. High school because I am sure it was on some list for recommend for teens. I understand that our teens here things in school all day long. I think reading about it and seeing it on tv is a different thing all together. I am just going to quote my 14 year old that read this book "Those parts are burned into my brain". He did check this out of his school library.