Sex and the City: what's sex got to do with it?

The ladies struggle with balancing relationships with sex: Carrie has great chemistry with Ray but can't get him to talk about anything important; Samantha's relishing her relationship with Maria but finds herself in the unusual position of having to learn more about the sex. Meanwhile, having decided to abstain from sex, Miranda resorts to using chocolate as a substitute and Charlotte decides she's fed up with sacrificing a relationship with Trey in favor of their suddenly sparkling love life.