Dirty knowledge, you can watch more interesting TV programs and read some interesting books when you have nothing to do. You will find that the world is full of miracles, and there are a lot of interesting little knowledge that we don't know. Here are some dirty and cold knowledge I have compiled.

Dirty and cold knowledge 1 1, the vibrator had other uses.

When vibrator was invented in19th century, it was originally used to relieve hysteria. However, now I don't suggest you take a girl's vibrator to see if she will fall into hysteria. A close call.

2. Sperm proportion and motility

A teaspoon of healthy adult male semen contains 300 million sperm. However, only one winner can fertilize a female egg, and it can live in your body for a whole week.

3. The first thing people do after taking a snapshot is ...

Not hugging, not sleeping, but ... brushing friends circle and visiting Weibo-36% of people under 35 will do this. I hope they are not sending photos!

4. Women are more likely to have sex.

Do you think men have sex more than women? No! According to unreliable surveys, women have more sex lives than men 17% on average.

5. The longest climax

Even though male orgasm has always been the focus of everyone's attention, even though everyone knows that women are not so easy to orgasm, in fact, female orgasms can have the last laugh-fewer times and higher quality. The average orgasm time of women lasts 20 seconds, which is longer than that of men's 6 seconds 14 seconds.

6. Orgasm is good for you.

Orgasm is good for health! They can reduce the probability of women suffering from heart disease, stroke, breast ai and even depression. So have fun!

7. Sexual exercise is not a fallacy.

Sex is also a kind of exercise! Thirty minutes of active sex can help you burn 200 calories, and you can even reach an orgasm during exercise.

8. Women are hotter than appearance.

Although straight women claim that they will only be aroused by men, in fact, every kind of sexual stimulation that most women see will be aroused, including male and female nudity, heterosexual homosexual sex and even animal sex.

9. Sex can make you dirty (in a good way).

People are unlikely to find anything disgusting when they are aroused. Naive boys and girls always find sex disgusting, but once this door is opened, their taste will get heavier and heavier.

10, how does your brain react to sex?

Researchers at Rutgers University in the United States have found that when different sensitive fMRIas of your brain are stimulated, different parts of your brain become active.

1 1, hormones released during sexual life make it difficult for you to pee.

Do you find it difficult to pee after sex? Your body will release vasopressin during orgasm, preventing you from urinating as usual. Don't hold it for too long, or you will be in danger of infection.

12, why is it so difficult to get pregnant?

When I was ready to have a baby, I found that contraception was so hard before, and now it is so difficult to get pregnant! In most cases, a woman only releases one egg a month.

13, Sexual intercourse status of American teenagers

According to the survey, 7 1% of American teenagers had sex at the age of 19.

Call during sexual intercourse.

Women can perform multiple tasks! A survey found that at least 12% of women admitted that they would use mobile phones during sexual intercourse. I wonder how their other half feels.

15. When will children lose their virginity?

On average, boys will lose their virginity at 16 and 9 years old, while girls will lose their virginity at 17 and 4 years old.

Talking about sex life.

The more people openly talk about their sex life, the more satisfied they are with their sex life. Except the braggart who has nothing to say.

17, you are not the only one aroused by food.

Think food is sexy? Some people admit that when they think about food, they feel the same sexual desire as during sexual intercourse. This may also be some kind of fetish.

18, body image is very important in sexual intercourse.

A small survey of obese women found that those who accept their body are more satisfied with their sex life. So please appreciate your body, or your sex life will be very painful. Fat girls make men warmer and more comfortable, while girls with backbone sometimes make men feel a little uncomfortable.

19, performance improves the threshold of your brain.

According to a study published in the Journal of Sexology Research, a person's pain threshold will greatly increase during sexual arousal.

20. Your brain shuts down a part during sexual intercourse.

According to a study in university of groningen, the amygdala associated with fear and anxiety is turned off during female orgasm, so that you can concentrate on your sex life.

Dirty cold knowledge 2 1. In the Middle Ages, the western church had very strict regulations on marriage and sex, requiring monogamy and not allowing divorce. There are strict rules about when to have sex and what posture to take.

For example, husband and wife only allow one posture ("missionary posture"), and using other postures is a dirty crime.

2. There is a popular way of "beauty" among the women of Bushi and Hadentate in Africa, which is called bending the spine, that is, bending the spine makes the waist of women collapse and the buttocks become more attractive. This kind of "beauty" is more cruel than China's ancient foot binding and European popular waist binding.

Pluto has not orbited the sun since it was discovered, and it has been excluded from the solar system. ...

Pluto was discovered in February of 1930 and 18. It takes 248 years and 2009 years to orbit the sun once, so it will complete its first orbit around the sun on March 23, 2 178.

Why is Pluto so slow?

First, the average orbital distance of Pluto is 5.9 billion kilometers, which is much larger than other planets in the solar system (the earth is 1, 500 million kilometers); Second, Pluto's orbit is highly inclined, and it surrounds the sun at an inclination angle of 17 degrees.

Paraguay's national flag is the only country with two different sides in the world.

Arabs raise sheep not only for eating.

U.S. military drones can often photograph them shooting sheep in the wilderness. After they find drones, there are often a group of people chasing them with pants and stones. ...

6. There is a dirty and cruel truth about kangaroos.

This is a kangaroo story that touched people's lives some time ago-the male kangaroo is holding the dead female kangaroo, and there is a baby kangaroo next to it. This story made many people cry, and everyone thought it was a warm scene in the animal kingdom.

But the zoologist knew the truth and decided to say it to disgust everyone-look at the picture carefully, Ding Ding, the erect male kangaroo betrayed it. Some experts believe that the death of the female kangaroo was caused by Qiang X's illness.

7. French romance may be due to illness, really, illness. ...

The French are naturally romantic, even a little crazy ... it is easy for us to see unscrupulous kisses in the street or cars in vibration mode in the street. ...

Why are the French so romantic?

Some experts believe that this is a disease that the French suffer from-hookworm disease.

As we all know, this disease is unique to cats, and the French are all cat slaves ... France has/kloc-0.07 million cats, and Paris is basically occupied by cats. It turns out that the incidence of hookworm disease in France is extremely high.

The sequela of this disease is that people may be a little stupid and then have a strong sexual desire. For example, every Frenchman must have birth control pills in his pocket.

8. Tortoise can inhale its own fart.

9. After Disney aired The Princess and the Frog, more than 50 children were hospitalized for salmonella infection (because they tried to kiss the frog).