So how do they resist the temptation? Maybe they grow out of it and realize there's something beyond one-night stands and serial dating. Warren Beatty was the biggest playboy around, but he seems to have figured it out. In a 2007 story in The Independent, he said of his 18-year marriage to Annette Bening, "She has a great capacity to be happy, which is a great gift to me and an even greater gift to her children ... For me, the highest level of sexual excitement is in a monogamous relationship. I would hate myself if I failed to live up to it."