In life you can't always get what you want, but in bed—well, that's another story. Whether you want if faster, slower, more often, more intense, whether you have some secret desire to be painted in chocolate or tied to the bed board, chances are you can get your lover to oblige your desires. But great sex—or the kind of sex you want to have—doesn't happen automatically or via telepathy or even intuition. You must be able to communicate your wants and needs to your partner, and therein lies the rub. Because if men and women have trouble communicating in daily life…