When it comes to knowing what makes your partner tick in the bedroom, Googling " mind-blowing sex positions " only get you so far. Stimulating and gratifying sex is all in the timing, the communication, and the spontaneity, according to Dr. Bea Jaffrey—a clinical psychologist and psychotherapist based in Switzerland—and Mary Jo Rapini, a Houston-based psychiatrist and sex therapist. But what does that mean you should do , exactly? Fortunately, Rapini shared tips with Marie Claire about what actually works in the bedroom lots of her tips are backed up by research, to boot! Research suggests that better communication is key to better sex —and no, we don't necessarily mean dirty talk.