Recommended reading: 5 kinds of "insecticides" to kill ambiguous love instantly

18 years old.

The age of 18 is the "peak" age of male sexual function, because the secretion of male hormones is strongest at this time. But due to lack of experience, men of this age may not have the best sexual performance.

15 cm.

After 90% of men have an erection, their penis length is 14-16 cm, with the majority being 15 cm. However, if a man is obese or overweight, his penis will be much shorter.

45km/h.

Refers to the speed at which a man ejaculates. The sperm rushes forward at a "medium speed" from the vas deferens to the glans. However, once it enters the vagina, it slows down sharply, as if thousands of troops are driving from four lanes onto a one-way lane at the same time. Under normal circumstances, it takes sperm 5 minutes to reach the cervix, and then it takes 72 hours to "meet" with the egg.

Recommended reading: Extramarital sex Do you and I need it?

5 calories.

The volume of a single ejaculation is equivalent to a mouthful of phlegm, and its calories are about 5 calories. "This is considered high in calories, because semen is rich in fructose and biological enzymes." Mark Goldstein, professor of reproductive and urology at Cornell University in the United States, said.

64 liters.

The volume of male ejaculation each time is 2-7 ml, which can produce 64 liters in a lifetime, much of which is prostate fluid.

10 hours.

Swiss research found that most men's body functions have been fully restored about 10 hours after sex. The so-called "you can't have sex before a competition" is a complete fallacy.