Mark Regnerus is a sociologist at UT-Austin.Author of over 30 published articles and book chapters, his research is in the areas of sexual behavior, family, and religious behavior.His new book,Premarital Sex in America, is due out in December 2010 from Oxford University Press. Before that, he wroteForbidden Fruit: Sex and Religion in the Lives of American Teenagers(Oxford, 2007), which tells the story of how religion shapes teen sexual decision-making.