It's been a rough few years for Kirstie Alley, 53, and not just because her career has been in a slump. On the episode of Oprah Winfrey's show that aired Nov. 12, Kirstie made a shocking revelation that she hasn't had sex in four and a half years, confessing, "I don't want to have fat sex!" About 10 months ago, Kirstie told Oprah she faced the fact that she had blown up: At last count her weight was about 260 pounds. Kirstie recalled stripping down and looking at herself in a mirror: "I have seen myself naked.... I couldn't believe...