Duncanville, Texas, which proclaims itself "The Perfect Blend of Family, Community and Business," is a city of 36,000 just southwest of Dallas. While it has about 50 places of worship, it does not have a single, registered, sexually-oriented business. It does, however, feature a late–’70s, split-level home on Cedar Ridge Drive owned by a couple of swingers.Since 2004, Jim Trulock and Julie...