Why the F-ck Do We Swear During Sex?

We asked experts why it feels so good to say *bad* things

A graphic of lips with swear words coming out of it

(Illustration: Leo Tapel)

You know the feeling: you’re in the middle of a passionate hookup, and your muscles start to tense. Your breathing gets heavy as waves of pleasure pulse throughout your body. As the feeling intensifies, you may start to shake and sweat. The moment just before euphoria hits, you suddenly blurt out “holy f-ck” as you come.

Congratulations—you just swore during sex.

According to Dr. Timothy B. Jay, a psychology professor at the Massachusetts College of Liberal Arts, shouting out profanities during an orgasm is perfectly normal. “It’s an emotional response some people emote sort of involuntarily,” he says. “Around orgasms, people might say things they’re not fully aware of, or it can be a habit that they do when they get excited.”

But why does “f-ck!” come out of our mouths when we f-ck? There isn’t one definitive answer, but experts say there’s a few reasons why.

Many of us learn to swear during sex

“Swearing is mainly the language of emotion,” Jay explains. “A lot of people use it as a way to either get out their own passion, or communicate passion to their partner.”

Unlike inborn expressions like grunting, crying and screaming, swearing is something that we learn to do as we develop, Jay says. If you were raised in a household where curse words were forbidden, you might not have learned to use them to express intense emotions, good or bad. Instead, you might use “holy cow” or “heck.” But if “shit,” “damn” and “f-ck” were words you heard growing up (or heard in movies), they’re likely a part of your lexicon as an adult. So even though cursing when you orgasm feels as natural as a moan, it’s actually a conditioned response.

“Our ability to swear is not innate,” Jay reiterates. “You have to learn how to do it.”  

…But biology is at play, too 

Before we blame Sex and the City reruns, it’s important to note that both sex and swearing tie into the same part our brains, says Daniel Almeida, a PhD candidate specializing in neuroscience and psychiatry at McGill University. While swearing is something we learn to do, once humans understand curse words, our instinct to drop an f-bomb comes from the same place an orgasm does.

“Research shows that swearing might involve brain structures that are not the same as regular language,” says Almeida. “Swearing is probably in a deeper part our brain known as the limbic system.”

The limbic system is the part of the brain that controls our instincts and emotions, explains Almeida. Within the limbic system is a smaller area of the brain known as the hypothalamus. When you climax, Almeida says, the hypothalamus releases endorphins. The hypothalamus (our climax control centre) is also where our instinct to swear comes from. Translation? When you reach orgasm, you might have an urge to swear. Thanks, brain.

Swearing heightens emotions

Just like an orgasm, swearing can also make you feel real good. “Swearing enhances our emotions—whatever they might be,” says Dr. Emma Byrne, author of Swearing Is Good for You. According to her research, swearing is an emotional “intensifier” humans use in both negative and positive situations—including sex.

“Swearing gives you an increased heart rate and more adrenaline courses through your nervous system,” she says. “So, if you’re feeling aroused and happy, you are going to intensify that with feeling with swearing.”

Bottom line? Swearing during sex is totes normal, and if you’re into it, you should yell f-ck from the rooftops.


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