Building on the popularity of their "Waffles and Spaghetti" books, the Farrels combine humor with solid research in a book designed to help men and women move past conflicts caused by innate sexual differences. Readers who want to understand the opposite sex will find a gold mine of information in Why Men and Women Act the Way They Do, including: Are there differences in the genders at birth? How do differences in the way a child is raised affect adult relationships? What does testosterone do to a man? Premenstrual Syndrome: Fact or fairytale? What do men and women love to talk about.and why?