Honestly, would you, as a beautiful woman, want to climb in bed with Hugh Hefner? Woody Allen?
Women who are older and dating younger men are always very well kept, are wearing makeup, have had plastic surgery and are doing all they can to stave off the aging process.
Please, give an example of a woman the age of Hugh Hefner or Woody Allen that any man under the age of 50 might reasonably be attracted to sexually. The only examples you've listed are Madonna and Rachel Hunter. Hardly valid comparisons.