Now the Hollywood cougar trend may be taking a greater hold on "regular" people.
"When us mortals see Hollywood couples doing it [older women dating younger men], we say, 'If they can do it, why can't I?'" Sussman said. "It's almost like Hollywood gives us permission to date in this manner."
Parry agreed that in some cases it may be because of all the media attention that the cougar lifestyle is getting that older women choose to date younger men and vice-versa.
"To a certain extent younger men and older women have been given a thumbs-up to date each other," Parry said.
"But the guys I know that have dated older women have done it for other reasons than it's hot to date a cougar. In the end, both people have to be in it for the right reasons and it has to be genuine."
Here are five of ABCNews.com's favorite cougar and cub, a slang term for the younger male, couples.
Demi Moore and Ashton Kutcher
The couple that started it all is still together and by Moore's own account in April's "Harper's Bazaar" very happy. In the magazine, Moore said the couple met at a New York party in 2003 after they were introduced by a friend, not Sean "P. Diddy" Combs as had been previously and widely reported.
"I knew it had the potential to be something special right away," she told the magazine. "It was so disproportionate, the level of emotion we were experiencing to the time we had spent together. But when you don't know someone, you can't just jump and say 'I love you.' Yeah, no. We used to end our calls or e-mails with 'And everything we don't say.'"
Moore also said that the couple spends most of their time away from the cameras watching television and enjoying each other's company.
Moore, 47, and Kutcher, 32, have been together for seven years and married for five. And, it seems, despite the 15 year age difference, that the couple is still going strong.
Mariah Carey and Nick Cannon
After only six weeks of dating, these two celebs, Carey, 40, and Cannon, 29, tied the knot in a surprise wedding on Carey's Bahamian estate.