Every year on September 16, millions of people around the world celebrate their birthdays, making it the day with the largest number of birthdays in the world. This also shows that winter is the peak period for pregnancy. According to reports, there are many interesting patterns in human sex that are as precise as a calendar.

More than half of people would choose sex on Friday

December is the peak pregnancy period every year, and August is the "low" period for pregnancy throughout the year. Research from the University of Texas believes that "from a biological point of view, the reason is that sperm quality is not high in summer, and long days and short nights can affect ovarian function; while December has many holidays and cold weather, and people tend to have more intense sex, making it easier to get pregnant."

The most people have sex on Fridays, and Monday is the time when sexual activity is low. The data comes from Tokyo Fun's 2011 sex survey. The survey covered the time period, location, frequency of sexual life of men and women in Tokyo, as well as the identity of their sexual partners. It was found that 56% of people would have sex on Friday, followed by Saturday at 30%, followed by Thursday, Wednesday, Sunday, Tuesday and Monday.

83% of people like to make love on rainy or cloudy days. A large-scale survey conducted by a condom company in the United States shows that people are more likely to have a desire for intimacy on rainy days, and their feelings for each other will become closer.

Some people refuse to be intimate because the weather is hot, and some people don't want to be intimate because of the cold. The former is twice as likely as the latter. A survey in the United States found that 35% of people have repeatedly refused to be intimate because of the hot weather, while 19% of people have refused to be intimate because of the cold weather.

The odds of making out in the evening are 13 times higher than in the afternoon. The people surveyed said that sexual intercourse requires the right time and place. Although sexual desire is high in the afternoon, it is not suitable for sex. After finishing the day's work, it is more suitable for sex in the evening.

The frequency of sex will increase after the job becomes stable. Researchers at the University of Lugano in Switzerland found that job instability can lead to low sexual desire, and that sex will be more harmonious for a period of time after the job enters a stable period.

Sex is awesome without foreplay in four situations

The importance of foreplay is self-evident. Countless sexologists have warned men that if they want her to be satisfied, they must do enough foreplay. However, nothing is absolute. In some cases, skipping foreplay and going straight to the topic may bring surprises and satisfaction. Situation 1: After a sweet date. You spent a happy day together, shopping, going to the movies, having a nice meal, and maybe drinking a little wine to keep things interesting. When you embrace each other and walk into the bedroom, you are already very eager for each other, and the intimate actions have become a bit redundant. The most satisfying thing for you at this time is to merge into one and enjoy a sexual feast heartily. Scenario 2: When we meet again after a short separation. In real life, not every couple can be together every day. One party occasionally goes on a business trip or visits relatives, forcing you to be separated for a period of time. The short separation not only makes women more gentle, but also makes men's desires expand. At the moment of reunion, they kissed and embraced passionately, which had actually aroused each other's sexual desire. At this time, longing makes sex passionate, and gentle foreplay is slightly redundant. Situation 3: When enjoying fast sex. Quick sex saves time, you can "take advantage of every opportunity" and enjoy sexual pleasure anytime and anywhere. The time and place are also flexible, you can choose between work, in the bathroom in the morning, in the car when coming home, etc. In order to make quick sex more "convenient", couples should wear clothes that are easy to take off and take off. During sex, ignore foreplay and go straight to the topic. Situation 4: When there is good news to share. Exciting good news is like an aphrodisiac, making both parties extremely excited and unable to restrain themselves from wanting to get close to each other. At this time, if you both want to share your inner joy through sex, you don’t need to be too lingering. The most intense part is the excitement.