Each year, more than 800,000 women and children are lured, tricked, or forced into prostitution to meet an apparently insatiable demand, joining an estimated 10 million women already ensnared in the $20 billion worldwide sex trade. To date, most research on the subject has focused on the various issues that propel these women into the trade, but little has been investigated, or written, about those who trigger the demand--the "Johns." In this hard-...