Massive modern skyscrapers, obelisks, towers--all are structures that, thanks to their phallic shape, are often associated with sex. But other buildings are more subtly connected, as they provide the frameworks for our sexual lives and act as reminders of our sexual memories. This relationship between sex and buildings mattered more than ever in the United States and Europe during the turbulent twentieth century, when a culture of unprecedented sexual frankness and tolerance emerged and came to dominate many aspects of public life. Part architectural history, part cultural history, and part...