A reader asked: "Our 19-year-old son is staying with us during his college’s summer break. While my wife was vacuuming, she discovered a box of condoms under his bed. It was unopened, but I am still furious! My son knows that I strongly oppose premarital sex. He’s also well aware of my general philosophy: my house, my rules. When I confronted him about the condoms, which I discarded, he denied they were his. He claimed he was holding them for a friend, as if I were an idiot. I would like to throw him out of the house, but my wife disagrees. How should I proceed?"