Writers Matt Stone and Trey Parker are no strangers to edgy, profane, offensive humor (see: "South Park," "Team America" and "Cannibal! The Musical"). Is it really a surprise that their newest venture, Broadway’s The Book of Mormon, employs that same duck-and-cover, boundary-pushing storytelling? Stone, Parker, the cast and director-choreographer Casey Nicholaw say that there's a greater purpose behind the laughs.