No. Porn can’t teach you anything because it’s not faithful to reality. In real life, you’ll discover your tastes and preferences, and your partner’s, over time, with practice and experience. If you’re curious and you want to learn more, there are other sources of information: books, documentaries or TV shows, web videos made by professionals, your doctor, your parents or other people you know and feel comfortable talking to. You can also turn to erotic movies and books. Unlike porn, which presents explicit sexual images, erotica can help you develop your erotic imagination and reassure you about how you might approach a partner.