Sexual knowledge, understanding sexual knowledge

1 Many people will bend their penis a little during erection, and the degree varies from person to person, some will bend up and down, and some will bend left and right.

Oriental penis is about 10 ~ 15cm, and sexual ability has nothing to do with penis length.

Sperm production takes about 90 to 1 16 days, and it can survive in vagina or cervix for 72 hours.

Most penises are made of sponges, which are covered with a layer of epidermis. When sexually excited, the sponge will be congested, making the penis hard, long and thick, which is not suitable for sexual intercourse. This is called "erection".

Don't put a rubber band or belt on the penis to prolong the erection time or prevent him from ejaculating, which will easily lead to blood coagulation and necrosis of penis tissue.

If the penis is hit hard, it will break and make a loud noise. This situation must be sent to the hospital as soon as possible.

When a woman's vagina is not lubricated enough but forced to enter, the action is too intense, which will not only make the woman feel pain, but also may lead to your foreskin laceration. Although most of them will heal on their own, serious wounds need to be stitched up.

When testicles are inflamed, the penis exudes white or yellow secretions, urination is painful and uncomfortable, or anal stimulation occurs, sexual activity should be stopped immediately, because all the above symptoms can indicate that he may have sexually transmitted diseases and should seek medical attention immediately.