Me and my friends study in an Adventist School in Brazil, where sexology is barely taught. (Sex is SIN. So me and my friends, who weren't brainwashed by the idea that sex is the biggest sin ever, were talking and I was teaching them what you taught me. And then a question came, and none of us knew how to answer: What is the hymen? How does it work? Why some people say it hurts when you lose you virginity/break the hymen and other people say it doesn't? So, can you help us answering those?