Nowadays, people are becoming more and more open-minded about sex. Many young couples start living together after a period of time after establishing a relationship. Energetic couples live together. In addition to doing good contraceptive work, they also need to understand relevant matters. Physiological common sense, don't be misled by some rumors.

What physiological knowledge do you need to know after living together?

1. Women who have sex for the first time may not necessarily bleed, but men may have premature ejaculation

Not all women bleed when they have sex for the first time. Accidental injuries or strenuous exercise can cause the hymen to rupture. Therefore, you cannot judge whether you are a virgin based on whether you bleed during sex for the first time. In addition, most couples do not go smoothly when they have sex for the first time. Due to lack of experience, excessive tension and excitement, etc., their reproductive organs are sensitive and prone to premature ejaculation. This is normal.

2. Men also have “uncle-in-laws”

Before menstruation, some women are grumpy, always fussy about trivial matters, have severe mood swings, are accompanied by breast swelling and pain and poor sleep quality, which are manifestations of premenstrual syndrome. In fact, men also experience a few days of low mood and irritability. Therefore, couples should understand and tolerate each other.

3. In vitro ejaculation and safe sex are both unreliable contraceptive methods

The ovulation period will be affected by many factors, such as mood, season, living environment, diet, etc. Contraceptive methods during the safe period are unreliable and the contraceptive failure rate is extremely high. In vitro ejaculation contraception is even more outrageous, because before ejaculation, a small amount of sperm has already entered the female body in the secretion.

4. Gynecological diseases in women are generally related to men

Some gynecological diseases are transmitted by men, and no matter how much the actress takes medicine, they still cannot be relieved. For example, with trichomonas vaginitis, women are healthy, but men are infected with trichomonas. Women will be infected after sex. Therefore, both men and women should work together to pay attention to sexual hygiene and wash their private parts carefully before sex.

5. If you have delayed menstruation and abdominal pain, you need to be alert to ectopic pregnancy

Women who have had sexual intercourse recently, but their menstruation has not come for a week and is accompanied by abdominal pain, should go to the hospital for examination as soon as possible to see if it is an ectopic pregnancy. Ectopic pregnancy is a gynecological emergency. Once it ruptures and bleeds, it can cause massive bleeding and even be life-threatening.

6. Beware of cervical cancer after having sex

Although sex can be pleasurable, you should be wary of human papillomavirus. Anyone who has sex has the possibility of becoming infected. Long-term persistent infection for more than 5 to 10 years can cause cervical lesions in women and even cause cervical cancer. Men may develop anal cancer and penile cancer. Generally, women need to have a TCT examination or HPV screening every year after the age of 20.

7. Tampons are just a type of sanitary napkin

Some people have great misunderstandings about tampons, thinking that it is inappropriate for women to use tampons or that they can damage the hymen. Originally, there is a hole in the middle of the hymen, which is generally 2 to 2.5 centimeters in diameter and has a certain elasticity. Using tampons will not cause any harm to the body at all.

8. Don’t kiss hard on both sides of the neck

It is now popular to plant strawberries on your loved one. Although it is very romantic, it may be life-threatening if you are not careful. In particular, you should not kiss the carotid sinus, which is located on both sides of the neck, 5 centimeters to the left and right of the Adam's apple. Pressing for about three seconds can cause dizziness and starry eyesight, five seconds can cause confusion, and pressing for 10 seconds can cause convulsions or even death.

9. The breasts and testicles are one big and one small, and the penis is slightly crooked. Don’t worry too much

Almost every woman's breasts vary in size. This is a normal physiological phenomenon and there is no need to stress over it. Sleeping on one side for a long time or always moving one arm will cause the two breasts to be different in size. Male testicles are also different in size, with a general height difference of 1 cm. If the size of the testicles on both sides is obvious, you need to be alert to inguinal hernia and hydrocele, which may also be a tumor. In addition, the penis will be slightly crooked when erect. This is because the three cavernous bodies in the penis are unevenly filled with blood.

10. Men should use condoms correctly and women should take birth control pills correctly

Men need to know how to use condoms correctly, check the shelf life carefully, do not tear open the package with teeth, distinguish the front and back of condoms, put them on before sex, and empty the front air bag before use. In addition, women should take birth control pills correctly. The sooner they take emergency contraceptive pills, the better, but no later than 72 hours.

Warm reminder

Both women and men must understand the above common sense, pay attention to personal hygiene, and master correct contraceptive methods to reduce harm to women.