25 Odd And Bizarre Facts About Sex You Probably Didn’t Know

Posted by , Updated on November 24, 2023

Most psychologists and marriage counselors will agree that sex is an extremely important part of every romantic relationship—arguably the most important—even though few wouldn’t dare admit it openly. Sex is something you engage in with your partner that you don’t do with anyone else.

Of course, you can also embrace, talk to, and kiss your partner to express your love, but you usually do these things with your mother, your siblings, and even your friends. Sex, on the other hand, is the definitive act that draws the line between the kinds of relationships we have with people.

Further, sex as a unique expression of intimacy appears to have numerous benefits for one’s life and health, as many studies have shown: it’s a stress reliever, it reduces the risk of cancer (especially prostate cancer in men), reduces pain in many cases, improves sleep and can even cure insomnia in some instances, it even enhances skin and overall health.

Most importantly, however, sex between a man and a woman is the natural means of reproduction, perpetuating the human race. In other words, one could claim that sex is life. These are 25 Odd and Bizarre Facts About Sex You Probably Didn’t Know.



According to The State University of New York study, semen can help fight depression. Semen contains chemicals that elevate mood, increase affection, and induce sleep. It also contains cortisol, which is known to increase feelings of affection in the brain.

SpermSource: psychologytoday.com

Researchers at Rutgers University used MRI imaging to find out exactly what happens in your brain when you’re aroused. What they found is that different regions of the brain become activated in response to stimulation of the vagina, cervix, clitoris, and nipples.

human brainSource: Rutgers University Study, Image: commons.wikimedia.org

The average female orgasm lasts twenty seconds—fourteen seconds longer than the male orgasm.

timeSource: menshealth.com/, Image: Wikipedia

During sexual intercourse, in addition to the genitals and breasts, the inner nose also swells.

faceSource: Everything You Always Wanted to Know About Sex, Image: YouTube

-321° F is the temperature at which sperm banks store donor semen. At this temperature semen can be stored indefinitely.

thermometerSource: livescience.com, Image: Wikipedia

While giving birth, some women have been known to experience orgasm.

Source: livescience.com, Image: commons.wikimedia.orgSource: livescience.com, Image: commons.wikimedia.org

Besides humans, bonobos (a type of chimp) and dolphins are the only animals that have sex for pleasure.

dolphinsSource: bbc.com, Image: pixabay.com

It takes two tablespoons of blood to get the average penis erect.

bloodSource: lustability.com, Image: commons.wikimedia.org

Despite many people using it as a common excuse to avoid sex, sex can actually relieve a headache since it releases the tension, which restricts blood vessels in the brain.

headacheSource: livescience.com, Image: Wikipedia

Studies have shown that eighty-five percent of men who die of heart attacks during intercourse were cheating on their wives. Hmmm, guilty consciences I suppose.

PaintingSource: dailymail.co.uk, Image: Wikipedia

Greek couples have sex an average of 138 times a year, placing them at the top of the world sex league. Japanese couples have sex just forty-five times a year, which puts them in last place.

Couple kissingSource: durex.com, Image: pixabay.com

If you think these sex facts are bizarre, you should check out these 25 shocking facts about porn.


During an average man’s lifetime, he will ejaculate approximately seventeen liters of semen, which amounts to about half a trillion sperm.

SpermSource: everythingssexy.com, Image: Wikipedia

When a man ejaculates, the initial spurt travels at twenty-eight miles an hour—faster than the world record for the 100-meter sprint, which currently stands at 27.49 miles an hour.

SprinterSource: livescience.com, Image: Wikipedia

For both men and women the heart rate averages 140 beats per minute at orgasm. That’s considered a tachycardia.

EKGSource: Everything You Always Wanted to Know About Sex, Image: Wikipedia

Marilyn Monroe, the most celebrated sex icon of the twentieth century, confessed to a friend that despite her three husbands and a parade of lovers, she had never had an orgasm.

Marilyn MonroeSource: dailymail.co.uk, Image: Wikipedia

A teaspoon of semen contains approximately five calories. Half an hour of intense sex burns off an average of one hundred to two hundred calories.

fitness athleteSource: Everything You Always Wanted to Know About Sex, Image: Wikipedia

The vibrator, a common sex toy for women, was originally designed in the nineteenth century to fight the anxiety-related symptoms of hysteria. There was even a play about it, In the Next Room (also known as The Vibrator Play), performed in 2009.

sex toySource: thedailybeast.com, Image: commons.wikimedia.org

A chicken egg could accommodate the number of female ova necessary to repopulate the earth to its present population.

chicken eggSource: livescience.com, Image: commons.wikimedia.org

The earth could be repopulated to its current level using the amount of sperm that could fit in an aspirin capsule.

pillsSource: livescience.com, Image: Wikipedia

In the Aztec culture avocados were considered so sexually powerful that virgins were restricted from contact with them.

avocadoSource: ancient.eu/Aztec_Civilization, Image: Wikipedia

Check out even more facts about virgins and virginity by clicking on this link.


Chocolate contains phenylethylamine, the same feel-good chemical responsible for the ecstatic high people experience in sexual attraction and love.

chocolateSource: Everything You Always Wanted to Know About Sex, Image: pixabay.com

Researchers have repeatedly observed female penguins exchanging sexual favors with male penguins that aren’t their mates in exchange for pebbles they will use to build nests for their babies. Yep, female penguins engage in a bizarre form of prostitution.

penguinSource: animals.nationalgeographic.com, Image: Wikipedia

The earliest known illustration of a man using a condom during sexual intercourse is painted on the wall of a cave in France. It is dated between twelve thousand and fifteen thousand years old.

Ancient illustration Source: archaeology.org, Image: Wikipedia

In ancient Greece the common slang for oral sex was “playing the flute.”

Greek statueSource: theconversation.com, Image: commons.wikimedia.org

During World War I members of the British Secret Intelligence Service (MI6) discovered you could use semen as invisible ink. They stopped using it after they realized how badly it smelled when it got old.

british Secret Intelligence ServiceSource: britannica.com, Image: Wikipedia