"For most women, regular pelvic floor exercises can make a major difference, and can sometimes solve the problem completely," says Dr Jarvis. "You’ll need to learn how to do them properly, and to do them regularly for several weeks before you notice a significant improvement." The Fundamentals of Sex From attraction to action, sexual behavior takes many forms. At least for humans, this most basic of activities is anything but basic. As the pioneering sex researcher Alfred Kinsey put it, the only universal in human sexuality is variability itself. Human interest in sex is not a matter left to chance but more a built-in imperative; survival of the species depends on it. Although sexual desire may wax and wane over the .