Sex is everywhere. It is on the covers of magazines in the check-out line, the subject of T.V. shows, uninvited In pop-up windows while surfing the web, and sometimes graphically plastered on the walls of the boys’ bathroom at a local park. I can turn the T.V. off and put a firewall on my on my internet, but I can’t put blinders on my kids every time we leave the house. I could complain about the way other women dress or the culture that idolizes sex, but I can’t control the world. Instead I must teach my kids to guard …