About five years ago, a disturbing trend began appearing on YouTube. Teen girls, and in many cases, preteen girls, started posting videos that asked strangers on the Internet to answer one question: Am I pretty? It's a question that most women wonder about at some point in their lives, often in secret and while standing in front of the bathroom mirror. But a question we don't often ask ourselves is why do we care? And what are the perils that come when society values more how women look than