Many people convert a dog's age to a human age by simply multiplying it by 7, but this is incorrect. This myth dates back to the 13th century, yet we still believe it today. Based on this example, scientists have demonstrated that people are more likely to believe seemingly true fabricated facts that align with their accustomed world than new facts. Even if the new fact is 100% correct, it may not appear so.

We've read hundreds of studies proving that these 22 less-than-pleasant facts about humans and the world around them are true. But we still find it hard to believe that koalas eat poop.

Now, let's take a look at these 22 slightly risqué and interesting facts!

• If you don't close the toilet lid when flushing, fecal bacteria may get on your toothbrush.
• Feces can pass through 10 layers of low-quality toilet paper.
• In the human embryo, the anus forms first, followed by the mouth, which is why humans belong to the deuterated anastomosis class.

• Squeezing pimples near the nose and nasal folds can be extremely dangerous for your health. Scientists call this area the "death triangle" because it is directly connected to the brain via blood vessels, allowing infection to spread very rapidly.
• Many perfumes contain ambergris as a key ingredient—a substance found in the digestive tract of sperm whales. Even after the addition of alcohol, it still smells very much like feces.
• The beauty product samples in the store contained pathogenic bacteria that could cause eye and skin infections.

• British beards cause a loss of 99,000 liters of beer every year.
• Rap duels are not a recent phenomenon. From the 5th to the 16th centuries, it was common in England and Scotland to insult each other by reciting poetry.
• In 2008, over 50% of British teenagers believed Sherlock Holmes was a real person, while 25% believed Winston Churchill was a fictional character.

• Left-handed people are five times more likely to die in an accident (e.g., while driving) than right-handed people.
• By the age of 50-60, people lose about 50% of their taste receptors.
• The human body does not consider the eye as its own organ. However, a special protective barrier prevents immune cells from entering the eye and destroying it. This is called privileged immunity of the organ.
• The average amount of urine produced in a public swimming pool is 75 liters.

• The human body contains as many bacteria as cells: approximately 10 trillion.
• People who drink coffee regularly ingest about 140,000 insect fragments each year (most of which are completely harmless).
• At least 250 climbers have died on the way to the summit of Mount Everest. It's too dangerous to remove them. Some bodies even serve as markers: climbers can know their altitude by knowing where certain bodies are.

• If you can smell a certain odor, it means that the molecules of that odor are already present in your nose.
• Although cats can transmit toxoplasmosis and cause brain damage, the risk of developing schizophrenia is very low.
• Puppies love squeaky toys because the sound reminds them of the sounds of prey.

• It would take 1.1 million mosquitoes to drink all the blood from one person.
• Sloths defecate once a week because their digestion is very slow.
• In the first few months of their lives, koala babies eat their mother's feces: this is how they learn to digest the eucalyptus trees they eat.

What other unusual or quirky facts do you know?