Sexual knowledge and sexual positions (adult novels about sexual knowledge)

Sexual knowledge and sexual positions are all covered. "Sex" has always been mysterious, and seems to be something that can be understood but not expressed in words. For Chinese people, it is even more of a boudoir matter. Everyone is interested in it but cannot discuss it openly in public.
However, in recent years, as western culture has spread eastward, many Western things, even customs and concepts have gradually been introduced. There are also different perceptions of sex. Not only in the basic knowledge of sex, but men and women also have different demands or enjoyments in sex.
The pleasures of the boudoir are diversified, and the postures are even more bizarre. Are sexual postures related to sexual interest or male and female orgasm?
In fact, sex life or sexual enjoyment is like drinking water, only the person knows whether it is hot or cold. The same goes for sexual positions, which vary from person to person, and may even vary due to time, place, and mood. Moreover, the distribution of each person's erogenous zones is also different. Most women have their own preferred positions. Some people like the traditional man on top and woman on bottom, while others have to ride on the man to have an orgasm. It would be great if the man could cooperate.
However, the most important thing is that both parties must reach a consensus and find the best way. For some patients with sexual dysfunction,
Once the posture is changed, the erect penis will immediately soften. At this time, women should be more considerate and gentle, and with timely treatment, even women who have special requirements for body positions can cooperate well.
Some infertile couples, in order to have a son or a daughter, pay a lot of attention to sexual positions. But does sexual position affect conception or the gender of the baby?
In fact, during sexual intercourse, the successful combination of sperm and egg is the first step to pregnancy. A normal man ejaculates about 60 million sperm each time. Among the thousands of galloping horses, they bravely compete for the first place, cross the cervix and reach the fallopian tube. Among them, only one champion can enter the egg to form a fertilized egg.
Most ejaculation occurs in the vagina, and at most can only deliver semen to the cervix. Therefore, the sexual posture has nothing to do with pregnancy or not. What is important is whether there are enough normal and active sperm in the vagina. It is worth mentioning that some couples may accidentally get pregnant even if they do not ejaculate in the vagina, because sperm will swim along the labia into the vagina.
There is a foreign film that has caused quite a stir recently, "Murderer" starring actor Tom Cruise. The male and female protagonists are standing in love and the woman is on top of the man. She screams and cries out in the screen, which is heart-wrenching. Is it true?
From a medical point of view, no posture is harmful to people, but the posture of sexual intercourse should be based on the principles of naturalness, effort saving and comfort. Patients with heart disease, fractures, and hemiplegia should do things within their ability. Patients with colostomy should clean the stoma before intercourse. Do not imitate some difficult movements in porn movies easily to avoid waist injuries.
People who like the riding position with the woman on top and the man on the bottom should be especially careful not to move too much. The sudden pressure of the whole body's gravity on the hard penis can often cause the penis to break. If not treated immediately, the penis may become deformed in the future at the very least, and may suffer from impotence and lifelong regret in severe cases.
People who like anal sex should rinse clean after anal sex before having vaginal sex, because there are a large number of E. coli in the anorectal area, which can easily cause cystitis or vaginitis in women after sexual intercourse.
In short, sex is a spontaneous act, just be happy, the most important thing is that both parties are satisfied, pay attention to the cleanliness and safety of sexual behavior, try not to have sex, or use condoms to ensure safety, some difficult or