The panelists of "Nightline Face-Off: Born to Cheat?": from left to right: Jenny Block, author of "Open: Love, Sex and Life in an Open Marriage"; Jonathan Daugherty, founder and director Be Broken Ministries; Cynthia McFadden, "Nightline" co-anchor; Ed Young, pastor of Fellowship Church and Noel Biderman, CEO of ashleymadison.com. (Amy Gutierrez/ ABC News)