This study confirmed that polyester underwear can temporarily inhibit sperm production. It will increase the testicular temperature and decrease the plasma hormone level, thus inducing oligozoospermia. This is one of the consequences of wearing underwear by mistake: it leads to infertility and makes you lose the right to be a father. However, it is not only unmarried men who need to pay attention to underwear. Dr. Shafik also warned men who have become fathers that polyester chemical fiber fabrics will generate electrostatic field in penis tissue, weaken male sexual function and even make you attached to sexual apathy. Should pure cotton underwear be safe? Not exactly. If you are obese and sweaty, especially if you drive often, pure cotton underwear may cause eczema, prickly heat and other skin diseases. Because although pure cotton absorbs sweat, it is not easy to dry, and frequent sweating may breed bacteria. In addition to giving you a wet and uncomfortable feeling, it may also create "troubles" such as redness and itching in the perineum, which will become your ulterior secret. Secondly, the choice of underwear must be elastic and moderate, otherwise it will also cause many problems. Hospital urologists found that many men's penises have different degrees of deformation and bending. The reason is that people often wear tight underwear. Under the bondage of tight underwear, the penis has been oppressed for a long time. How can it not bend? And the color of underwear should be treated with caution. Some people like dark underwear, but forget that the color is dyed by dyes, which are a hodgepodge of various chemicals and contain certain toxicity. As for white underwear, there may be some hidden dangers due to excessive bleaching, which will increase your risk of becoming attached to allergies. Now you should understand that underwear is not a trivial matter, it carries multiple functions, such as protecting sexual organs, reducing the friction between thighs and trousers, and preventing odor from leaking out. Therefore, we must choose carefully and put health first, followed by comfort and fashion. Remember, wearing the right underwear is a sign that men care about themselves. Second, how to choose the right underwear to go to work. Suitable for wearing boxers or thongs, and can be "matched" with pants or jeans that are most commonly worn at work. When resting at home, loose flat underwear is the first choice, which has the advantage of allowing the sexual organs tightly pressed in the pants to move freely. T-underwear is the best way to go out for a walk, which can reduce the friction caused by a lot of activities (such as long-distance walking) on sexual organs. It's best to wear boxer shorts or flat underwear or sports shorts with mesh design when sleeping. When exercising, it is best to use sweatpants with good breathability, or close-fitting breathable tights similar to swimming trunks. The purpose is to minimize the friction between thighs, buttocks and sexual organs. In addition, underwear specially designed for athletes to wear during sports is also good, which is characterized by the fact that the sexual organs are supported by three-dimensional cut triangular cups, and the left and right sides have elastic bands to support the buttocks, which can make your buttocks more masculine. For business or tourism, disposable paper or cotton underwear is the best choice. In addition, ordinary white underwear can also be considered. Obese and sweaty people, especially men who drive, should not wear cotton underwear often. They should choose smooth, sweat-absorbent and easy-to-dry fabrics (such as Korean silk fabrics), and use cotton underwear at the bottom of key parts when necessary to avoid sticky feeling. Third, how to wear underwear is better. Men with thick legs are suitable for wearing high-fork briefs, which can make their legs look longer. In the design concept of women's underwear, height is generally used as a decoration to make the legs look slender, but the starting point of height in men's underwear is not sexy, but to take care of men with thick legs. It is reported that because of market feedback, men prefer to buy leg-wrapped underwear, so manufacturers still design semi-high underwear with hemming, which is more suitable if they are not used to full-height underwear. Fourth, how to wear underwear is healthier. No matter what style, it is best to choose light underwear. The lighter the color of underwear, the less dye is used, and the safer it is to wear. Be sure to wash your new underwear before wearing it to prevent allergies and other accidents. Take a vacation for underwear at the right time, such as when exercising and sleeping. Don't wear underwear when exercising, which can minimize the friction of important parts; When sleeping without underwear, bare skin can absorb more nutrients, promote metabolism, create a cool environment, facilitate spermatogenesis of testis, relax limbs, and help to enter deep sleep, which is why health experts advocate "naked sleep". Cleaning underwear is exquisite, such as washing it alone, not mixed with other clothes; Hand washing, don't bother with washing machine; Avoid soaking in washing powder for a long time to prolong the life of underwear.