The last of the Hollywood sex symbols, Raquel Welch began appearing in films in the mid-1960s and enjoyed a run as pin-up girl after capturing the public's imagination clad in a well-tailored fur bikini in the prehistoric fantasy "One Million Years BC" (1966). Who would have known she was a single mother of two? Her packagers never let on. They just continued to push the fantasy, creating an uphill battle for her to earn any respect as a serious actor. Welch ornamented a number of lightweight vehicles before bombing in the title role of "Myra Breckinridge" (1970--Mae West walked off with most