There are many reasons why people regret meeting a stranger, including fear of pregnancy or illness, not to mention feelings of disgust.

The Norwegian University of Science and Technology has published a study involving 263 students, aged 19 to 37, to see how the behavior of men and women is affected by regret after casual sex. They conducted two questionnaires at 4.5-month intervals and the answers are fascinating.

The study found that women are more likely to experience higher levels of remorse after an overnight stay, with 35% of respondents admitting they feel guilty. As you may have guessed, it is a little lower. Only 20% felt regret after a one night stay.

According to the study, women had greater concerns about pregnancy and sexually transmitted diseases. They were also more likely to be disappointed with the quality of their partner.

The level of remorse was lowest among those who felt satisfied, or that their partner was sex. Repentance, meanwhile, was more common among those who felt “sexual disgust” afterwards.

Regardless, they had more casual sex. This is because no matter how strong an emotional regret, it is not strong enough to defeat the underlying human lust.

So what is the point of regretting something you will do again? Exactly. This is the whole point of the study. Most negative emotions are created to protect us. We feel fear to keep us safe from danger. We feel disgusted to keep us safe from infection. But regret, according to this study, serves no purpose. You go out, have sex with a stranger, feel bad about it, and then go out and have sex with another stranger.

But that’s not the only form of sexual remorse, is it? No, it’s also unfortunate that I passed a one-night stand. Who feels it the most? Men, obviously. While 80% of women were happy to reject the possibility of casual sex, only 40% of men felt the same way.