As the movie opens, Beatty and Keaton are celebrating their 25th anniversary, an event that coincides with Beatty suddenly forgetting his wedding vows. With the energetic lack of sexual self-control he exhibits all over town, it's amazing the guy lasted 25 years. And all of a sudden he's jumping on every woman who says hello. It doesn't work. I just don't believe that Jenna Elfman or Natasha Kinski or Andie McDowall would fall all over themselves to get into this guy's bed.
Famous guys can get younger women.
But in these movies, they usually aren't playing famous guys.