Today, and over the next two days, Big Think will be posting a series of videos called "What Do Women Really Want?" Of course, there is not just one answer to this question, especially when it comes to what women desire in the bedroom. Yet the particulars of female sexual behavior, and how those particulars contrast with those of men, are the subjects of increased observation by neuroscientists, psychosexual researchers, and clinicians. Big Think interviewed six of these sexologists. We begin our series today with what two of our experts had to say about female orgasm. Specifically, why does it elude some women while other women are able to "think off," bringing themselves to climax without any kind of physical stimulation?