Dating someone half your age

Once you enter large-gap territory—the 20-year difference, the 30-year difference—the odds of divorce are ... If your partner happens to be 15 years older or younger than you are, that's not automatically a bad omen: Statistics, of course, are not destiny.

But, as predictors, the study's findings stand to reason.

Men, in contrast, are hypothesized to be most attracted to women in their reproductive prime, which tends to be when they are younger. Women’s preferences, on the other hand, hold relatively constant across their lives, not going more than a few years below their own age (extra-credit if you can identify the "cougar zone" in this figure), but women remain keen on men up to 10 years older than themselves. However, younger men (i.e., in their 20’s) tend to be married to someone of a similar age, but as they get older their wives get younger.

For example, by their 50’s the average male has a wife who is 10 years younger than him.

Age disparity in sexual relationships is the difference in ages of individuals in sexual relationships.

Concepts of these relationships, including what defines an age disparity, have developed over time and vary among societies.

The “half your age plus seven” rule of thumb probably helps you avoid being a creep, but is it accurate?

Dunn concluded that "Not once across all ages and countries ...

That's according to a study that compiled polling data from more than 3,000 recently married and divorced Americans.

The study—the overall findings of which my colleague Olga Khazan highlighted last month—used a multivariate model to calculate the factors that seemed to best predict the marriage's chances of success.

Differences in age preferences for mates can stem from evolutionary mating strategies and age preferences in sexual partners may vary cross culturally.

There are also alternative social theories for age differences in relationships as well as suggested reasons for 'alternative' age-hypogamous relationships.