I, as a parent, teach my children about values. Too much sexualization has in my opinion at least caused very many unwanted pregnancies, a major increase of STDs, the major spread of HIV and AIDS, and so on.
I can't fault the parents and schools for this, but I can fault the media: TV, movies, music videos throw sex in the faces of our children constantly. I try to protect my children from this onslaught by blocking certain channels and ratings, but I know that isn't going to always work as my kids get older. I can only keep trying and hope that my teaching will help them make the right decisions.
I believe that most parents do the same with their own children (I don't say all, because I know better).