Walking the thin line between journalism and fiction, this relentless reportage in story form reads like a long night out on the town. The author as main character uses the perspective of anonymous sex to probe the uncomfortable facts of social relations in the urban anomie among men, women, and beasts too. From ''The Anonymous Dog'' to ''Confessions of a Smoocher,'' ''Man and His Toys'' and ''The Smelliest Man Alive,'' each chapter takes you one step further to a place you'd rather not go, calculated to make you cringe before cackling.