Casual sex has been celebrated, condemned, dissected, and dramatized for as long as people have been having it. And yet, for something so common, nobody seems to agree on what it actually does to your mental state.

Here’s the short version: it depends entirely on you.

A comprehensive 2020 review of 71 studies published in The Journal of Sex Research found that most people reported a net positive emotional outcome from casual sex. But the researchers were quick to note that positive outcomes are far from guaranteed. Alcohol, not knowing your partner well, and walking away sexually unsatisfied, all made a bad emotional landing significantly more likely. So, you know, variables.

The cultural baggage doesn’t help either. Women have historically faced a lopsided double standard—penalized for behavior that men have largely been encouraged to pursue without consequence. Those dynamics haven’t disappeared, and they still color how people process their own experiences. Carrying shame that was never yours to begin with is its own mental health issue, independent of anything that actually happened.

What Casual Sex Actually Does to Your Mental Health

Research also consistently finds a gender gap in how people feel afterward. Studies published in The Journal of Sex Research show that women who hook up more frequently are more likely to report negative emotional fallout, while men tend to report the opposite. That’s not biology—it’s the predictable result of a culture that still doesn’t score the game the same way for everyone.

Power imbalances make things worse. When one person wants more than the other, more frequency, more acknowledgment, more of something that was never on the table, the person doing the wanting usually pays for it. Anxiety, self-doubt, and a low-grade sense of humiliation are common byproducts of a situationship where nobody actually agreed on the terms.

On the other side of it, people regularly report benefits: sexual satisfaction, a confidence boost, better self-awareness, and occasionally meeting someone worth actually knowing. That’s nice, right?

The deciding factor, more than almost anything else, is honesty with yourself. Casual sex works for people who can hold a separation between physical desire and emotional need, and who feel excited rather than vaguely terrible about the whole prospect. If the idea energizes you, that’s data. If you’re trying to logic your way past a knot in your stomach, that’s data too.

The research is mixed because people are different, and context changes everything. The more practical question was never whether casual sex is good or bad in the abstract—it’s whether it’s right for you, right now, with this particular person.