As a result, my so-called casual relationships go on a lot longer than most people’s so-called committed ones.

I date younger men off and on over periods of 2, 3, 4, 5 — or even 15 years.

Some women tell me they’d feel too insecure about their bodies to sleep with someone young, but when you operate on the criterion I do — that they have to be nice — you meet younger men who appreciate everything about older women.

But evolving gender roles in modern society have led to more equality between the sexes, challenging this antiquated notion for men.

Sam Owen, Elites Singles Partner psychologist, believes "young men nowadays probably also recognize that older women are adept at diligently juggling so many responsibilities (career, children, housekeeping, fitness, finances, socializing), which makes them intriguing and attractive and a more secure option."The dating website analyzed the upper and lower age search limits for more than 450,000 of its members to reveal the age of a man and a woman’s perfect partner.

It isn't all that surprising that Demi Moore and Ashton Kutcher's marriage appears to be in trouble. 24, 2005 -- Demi was 42 and Ashton was 27 -- few thought it would last.

Sure, at 48 Demi looks fantastic and, yes, Ashton has become a good stepdad to Demi's three kids, but many may have wondered if, sooner or later, their age difference might become an issue.