It is conducive to protecting male reproductive function. Many people feel embarrassed to sleep naked at first. In fact, comfort is an instinctive need of human beings. As long as it is for comfort and health, it is reasonable to dress and undress. Modern people have a fast pace of life, and daily sleep has become an important link to restore physical fitness and ensure health. After a busy day, undressing and sleeping is conducive to the circulation of qi and blood, so that the yang in the body can stretch freely. However, sleeping with clothes, especially wearing some fashionable tight underwear, may affect the circulation of qi and blood, inhibit yang, and is not conducive to sexual function. Tight underwear will increase the temperature of scrotum, lead to sperm production and development disorders, and reduce men's sexual ability; At the same time, tight underwear will also give genital strong friction and oppression, leading to erectile dysfunction, frequent nocturnal emission, affecting blood circulation and normal ejaculation. Naked sleep can reduce the temperature of testis, make sperm more active and naturally enhance sexual desire. "A Thousand Women's Children, Daolin Nourishes Sex" says: "Wet clothes and sweaty clothes can't last long, which makes people itch. "Young people who are full of yang and vitality, as well as male friends with thick thighs, often wake up and find that private parts such as groin and inner thighs sweat more. When sleeping, underwear will absorb sweat and secretions. Wet and sealed parts are easy to breed bacteria, which will lead to the accumulation of damp heat over time, causing wet sores and itching. In summer, wet underwear is more likely to increase the chances of germs entering the urethral orifice, and even cause infections of urinary system and reproductive system organs. Choosing naked sleep can avoid the above problems, enhance the secretion of sebaceous glands and sweat glands, help the skin to excrete and dissipate heat, and avoid itching and discomfort. It is conducive to enhancing men's sexual self-confidence. China's traditional health care advocates self-control and flexibility, and often has a childlike innocence. " Childlike heart refers to a pure, comfortable and open-minded attitude, just like a naked newborn, which is also the basis of having a healthy body and mind. Therefore, the most important thing to choose naked sleep is to completely relax psychologically. First of all, you can feel comfortable and calm about your body. Sleeping naked has a kind of unrestrained freedom pleasure. Clinical research has proved that it is quite effective in treating catatonic diseases, and it is also effective in treating male sexual dysfunction caused by anxiety and tension. For the couple's life, the naked human body is the best stimulus to arouse sexual desire. People in China have a conservative view of the life of husband and wife. Many male sexual dysfunction is caused by psychological tension and inferiority, which is not unrelated to the husband and wife's evaluation of each other's physical and sexual abilities. Couples who have developed the habit of sleeping naked are more calm about each other's bodies, more open to sexual life, and men are more likely to take the initiative in sexual behavior. At the same time, psychologically, it is more conducive to reducing the barriers and differences between husband and wife, increasing the opportunities for close contact, being more tolerant and appreciative of each other, and helping to maintain the feelings of husband and wife. Of course, you should pay attention to sleeping naked, and good hygiene habits are the key. Don't treat quilt sheets as close-fitting pajamas that don't need to be changed. Also pay attention to the choice of the texture of sheets and bedding, and it is better to use comfortable, soft and breathable fabrics to avoid irritating the skin and affecting sleep. In addition, if you have urogenital tract infection, don't sleep naked. (Wang Jue, Department of Traditional Chinese Medicine, Nanyuan Hospital, Fengtai District, Beijing)