Women are more likely to regret one-night stands than men. What’s up...

Women are more likely to regret one-night stands than men. What’s up with that?

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THERE’S SOMETHING ABOUT a one-night stand—the romped-in sheets, the clothes strewn about the room, the streaks of last night’s makeup under the eyes—that, depending on whether you’re a guy or a girl, can speak to two overwhelming emotions: satisfaction and serious regret.

Impulsively shagging someone you don’t know too well—and might not see again—isn’t all that uncommon an occurrence. About half of all Americans will have at least 1 one-night stand in their lifetime, according to one Norwegian University of Science and Technology study. And in some Western European countries, that number climbs to 7 in 10.

But which partner wakes up satisfied with a shit-eating grin, and which wakes up under a cloud of dread, breaks fairly consistently along the lines of what we already know about evolution and gender, a new study has revealed.

This isn’t the first time results like these have been uncovered. A previous study, conducted in the U.S., showed that, while 35% of women regretted their most recent episode of casual sex, only 20% of men felt the same. Norwegian researchers wanted to see if this also rang true in their country—which is alleged to be more sexually liberal—and, if so, why emotions conflict so greatly across genders.

To find out, they questioned 263 students ranging in age from 19–37, all of whom had had at least a single one-night stand.

The quick and dirty: Women regretted having a one-night stand far more than men. And men regretted passing up a one-night stand far more than women.

Only 30% of the Norwegian women said they were “unequivocally happy” with their most recent casual sex, compared with more than 50% of men who said they were content with their choice. And nearly 80% of women were pleased they’d skipped casual sex, while only 43% of men were happy they’d turned it down.

To try to understand why men seem so gung-ho about casual flings and women seem so dissatisfied, researchers worked with evolutionary psychologist David Buss, from the University of Texas at Austin, to create an in-depth analysis.

Here, listed from least to most important, are the top 7 reasons why she may be a handful in the morning.

7. A women worries more

Overall, females stress more than men over pretty much every facet of life, according to lead study author Leif Edward Ottesen Kennair. Men, on the other hand, are more prone to “do stupid things that they die from.” (His words, not ours.)

6. Unwanted pregnancy is always a concern

One-night stands aren’t always associated with late-night booze sessions, but it’s often the case. And with looser inhibitions and greater intoxication comes poorer decision making—like not using a condom. As long as pregnancy is a possibility, it will always be a potential cause of post-sex regret.