Masturbation! Good Sex Starts with YOU Coming around again in 2014 Do you know what your cock is really doing when it gets erect? What is your PC muscle and why is it important? There are really two sphincters back there? Have you found your P-spot? Have you ever paid attention to what feels good to you when you are giving yourself pleasure? The first class in the How to Fuck Better series, Bodymechanics and Basics is designed to teach you about your anatomy, how it works, how to explore it, and what to do next.