My wife suggested that maybe there was water sitting on the roof and leaking into the house, but I knew, as an experienced guy of the male gender, that she was wrong. I knew that the problem was the plumbing. It's time that we homeowners accepted the fact that plumbing is a bad idea. Many historians believe that the primary reason the Roman Empire collapsed is that the Romans attempted to install plumbing in it. Suddenly, instead of being ruthless, all-conquering warriors, they became a bunch of guys scurrying around trying to repair leaking viaducts. (Tragically, the Romans did not have "WD-40.")