Why men and women lie about who they slept with

The study found that men were willing to admit that they sometimes engaged in behaviors seen by college students as more appropriate for women, such as writing poetry.

The same was true for women, who didn't hide the fact that they told obscene jokes, or sometimes participated in other "male-type" deeds.

But when it came to sex, men wanted to be seen as "real men:" the kind who had many partners and a lot of sexual experience. Women, on the other hand, wanted to be seen as having less sexual experience than they actually had, to match what is expected of women.

"There is something unique about sexuality that led people to care more about matching the stereotypes for their gender," said Terri Fisher, author of the study and professor of psychology at The Ohio State University's Mansfield campus.

The depiction in the above image is not necessarily true. Researchers find that men simply lie about their so-called 'conquests' to impress their friends and acquaintances and so do women. Pic for representation

"Sexuality seemed to be the one area where people felt some concern if they didn't meet the stereotypes of a typical man or a typical woman," Fisher noted.

Fisher discovered how people would honestly respond to questions about sexuality and other gender-role behaviors by asking some study participants questions when they thought they were hooked up to a lie detector machine.

Participants were 293 college students between the ages of 18 and 25.

This result confirms what Fisher found in an earlier study, back in 2003 - with one important difference.

Back in 2003, women went from having fewer sexual partners than men (when not hooked up to a lie detector) to being essentially even to men (when hooked up to the lie detector.)

In this new study, women actually reported more sexual partners than men when they were both hooked up to a lie detector and thought they had to be truthful.

Fisher said the results of the study might actually be stronger than what was found here.

The study appeared in a recent issue of the journal Sex Roles.