Parents and teens alike are exploring sexual identity issues. Are they heteroflexible -- or fauxmosexual? Girls barely in their teens are exploring their sexuality. And more and more often, that exploration includes same-sex behavior. The trend has, inevitably, spawned new words. Some say they're "heteroflexible." Others sneer that they're merely "fauxmosexual." Is it really new? More importantly -- to parents and to the teens themselves -- what does it mean? Lisa M. Diamond, PhD, assistant professor of psychology and gender studies at the University of Utah, Salt Lake City, studies young women's sexual orientations, sexual attractions, and sexual behavior. "Women's...