Steve Slon, editor of AARP The Magazine, said that while much was made over 40-year-old Demi Moore dating Ashton Kutcher, 25, the AARP survey found the relationship, dubbed "tadpoling," is not just a celebrity trend.
"Twenty years ago, when a guy made it to the top, he could afford a trophy wife," Slon said. "Now, as women have more money, they can afford to date a man with less money."
The AARP Singles Survey of 3,50l men and women aged 40 to 69 found 34 percent of women were robbing the cradle, the New York Daily News reported.
Along with a rising divorce rate, biology also may help explain an older woman's lust for younger men.
"Young men have more sexual vigor and women often don't get there until their 30s," Dr. Joyce Brothers said. "So the older woman matched with a younger man has a better sex life."