by Katherine Zoepf, International Herald Tribune, France - The separation between the sexes in Saudi Arabia is so extreme that it is difficult to overstate. Saudi women may not drive, and they must wear floor-length black abayas and head coverings in public at all times. They are driven around in cars with tinted windows, attend girls-only schools and university departments and eat in "family" sections of cafés and restaurants, which are partitioned off from sections used by single male diners.