Reviewed in this essay: Poison Shy by Stacey Madden. ECW Press, 2012. Sex, bugs, and schizophrenia form an unlikely trinity, it is true. And yet they converge with surprising semblance in Stacey Madden’s first novel, Poison Shy. Told through first-person retrospective narration, Poison Shy is the story of a love triangle between two heavy-drinking late…