joan and david shannon were swingers. enthusiastic members of clubs whose sole purpose is to organize various combinations of spouse swapping. as joan told the police, she and david had been swinging for years, long before moving to north carolina. fayetteville, after dark, to their happy surprise, offered plenty of fresh opportunities to continue their lifestyle, as it's called. david discovered that, said joan. >> we get here, he gets on the computer, and he finds the location of a club. >> right off the bat? >> sure did, yes. >> who knew? it was as if this conservative bible belt state somehow needed secret outlets for its more lurid desires. >> he would go on the internet. there were a lot of swinger sites. david would look for people on these swinger websites. >> the swingers' club david found was one of many in fayetteville. and this particular one catered to both couples and singles. and how did that affect your marriage? >> i think it improved it. because, you know, so many marriages fall apart because somebody che