The impact of choosing leggings and underwear on fertility; the dangers of staying up late and electronic products; and the correct understanding of masturbation.

The desire to look good is universal and perfectly understandable. However, being a "trendy man" isn't easy, as wearing tight pants for extended periods can be a breeding ground for infertility. In the male reproductive system, the scrotum is a treasure trove, containing the testicles, epididymis, and vas deferens, but it's also highly susceptible to damage. The exposed nature of the scrotum places demands on men's clothing: it cannot be too tight.

Why does wearing tight pants for extended periods affect fertility? Before answering this question, let's understand the ideal environment for the scrotum. The male scrotum has abundant sweat glands and a muscular layer called the dartos fascia. When the external or internal temperature rises, the dartos fascia relaxes, and the sweat glands secrete a large amount of sweat, lowering the temperature inside the scrotum. In winter, the scrotum doesn't sweat, and the dartos fascia contracts, maintaining a scrotal temperature of 34-36℃, providing a favorable temperature environment for sperm production in the testes.

When men wear tight jeans, pencil pants, and tight underwear, the testicles are compressed towards the groin area, disrupting the scrotum's heat dissipation mechanism. Prolonged exposure to a high-temperature environment can impair sperm production. Over time, this can lead to conditions such as oligospermia and azoospermia. Furthermore, the scrotum's constant exposure to a hot, humid, and poorly ventilated environment, combined with friction from walking, makes it prone to scrotal eczema and dermatitis. The incidence of these conditions is particularly high during the hot summer months.

Furthermore, when men wear tight pants or jeans, the groin area is constricted, severely obstructing venous return in the spermatic cord. Over time, this can lead to varicocele. Varicocele can affect testicular spermatogenesis. The high concentration of toxic metabolic products in the blood of the left adrenal gland and left renal vein of patients with varicocele can easily affect testicular function before detoxification. Because there are communicating branches between the two testicular veins, varicocele on one side can affect sperm production in both sides, causing varying degrees of oligospermia, abnormal sperm morphology, and low sperm motility. Severe varicocele can even lead to testicular atrophy.

Besides the fact that wearing tight pants can easily lead to infertility, wearing clothing containing formaldehyde for a long time can also cause male infertility. Currently, many manufacturers add large amounts of dyes and finishing agents containing formaldehyde and aromatic amines to the fabric to maintain the bright colors and wrinkle resistance of their clothes. These additives may cause men to develop conditions such as oligospermia, azoospermia, asthenospermia, and teratospermia.

Underwear, as the first layer of clothing for the reproductive system, provides the closest protection to the genitals and is also the most vulnerable to injury. The requirements for choosing underwear for men who have not yet fathered children include the following three aspects.

(1) Loose and suitable: It should not be too tight or too loose (lacking sufficient support). Boxer briefs are suitable for various occasions, providing sufficient support for the male genitals. However, at night, looser boxer briefs should be worn to allow for ventilation. Alternatively, fitted boxer briefs can be chosen, which provide optimal support for the male genitals and are also suitable for various sports activities.

(2) Fabric Considerations: Comparing men wearing pure synthetic fiber underwear, cotton-semi-synthetic fiber blend underwear, and those wearing pure cotton underwear reveals significant differences in testicular temperature and plasma hormone levels. This is because polyester synthetic fiber fabrics can inhibit sperm production in the testes, leading to oligospermia and infertility. Furthermore, polyester synthetic fiber fabrics can generate an electrostatic field in penile tissue, weakening male sexual function and even causing frigidity.

(3) Light colors are preferable: Color selection is also important. Dark-colored underwear is usually dyed with various chemicals, which contain some toxicity and are not good for long-term wear. As for very white underwear, it may be due to excessive bleaching, which may pose certain risks. Therefore, it is best to choose natural-colored underwear.

This statement is incorrect. Influenced by feudal traditions and a lack of scientific understanding of the composition and origin of semen, the idea that semen originates from blood is deeply ingrained in some people's subconscious, leading to excessive abstinence. Some people are also terrified of normal nocturnal emissions and normal, non-habitual masturbation (such as occasional masturbation), believing that the loss of semen will severely deplete their vital energy and damage their reproductive function. This results in excessive mental stress, depression, neurasthenia, and ultimately, negatively impacts their physical and mental health.

During puberty, men continuously produce semen, which is stored in the prostate and seminal vesicles. Like any lake, no matter how large its capacity, if it continuously receives fluids without releasing them, it will eventually overflow. Scientific studies confirm that semen is composed of 99% seminal plasma and 1% sperm. Seminal plasma is primarily water, accounting for over 90%, with the remainder consisting of organic matter and enzymes such as fructose, citric acid, and acid phosphatase, containing only trace amounts of protein. Therefore, from a nutritional perspective, semen differs significantly from blood. So how should we view semen leakage? Married men should cultivate a regular sex life, avoiding both excessive indulgence and abstinence. Frequent sexual activity can lead to neuropsychiatric symptoms such as insomnia, vivid dreams, fatigue, dizziness, tinnitus, and lower back and knee pain. Excessive abstinence often results in mental abnormalities and may even lead to reproductive system diseases such as seminal vesiculitis and prostatitis. Normal nocturnal emission is a sign of good health and normal sperm production. Occasional masturbation, such as achieving sexual satisfaction through masturbation, is not only harmless to the body, but can also relieve mental stress and eliminate anxiety; there is no need for self-blame or regret.

Long-term sleep deprivation and overtime work can indeed affect a man's fertility. Firstly, clinically, patients with oligospermia, asthenospermia, or sperm liquefaction problems commonly experience sleep deprivation. Studies show that male semen quality is related to the glandular fluid secreted by the prostate and seminal vesicles, which is regulated by endocrine hormones. Men who frequently stay up late experience endocrine imbalances, which can easily lead to abnormal semen quality.

Secondly, men have a cyclical hormonal curve. Hormone secretion should be lower at night, but working late stimulates the cerebral cortex, forcing glands to secrete excessive hormones at night. Over time, this disrupts the body's circadian rhythm, causing hormonal imbalances and easily leading to male sexual dysfunction. This explains why men who frequently stay up late have a higher incidence of sexual dysfunction.

Furthermore, frequently working overtime and staying up late not only harms sexual function and fertility, but also causes significant damage to men's hearts and other organs. Studies have found that people with irregular sleep schedules find it more difficult to adjust their bodies than expected, and these individuals are not only more prone to irritability but also have a higher probability of developing heart disease. This is because the body's biological clock doesn't "reverse day and night," especially organs like the heart, which don't prepare for working late just because they rest during the day. Therefore, men who chronically stay up late have a higher risk of heart disease.

It's also important to note that frequently staying up late can lead to fatigue and lethargy, and weakens the immune system, creating a breeding ground for common illnesses such as colds, gastrointestinal infections, and allergies. Repeated occurrences of these illnesses can reduce the quality of life and work. Therefore, men should establish regular sleep schedules and avoid "unnecessary late nights." Even if they occasionally work overtime, they should rest and recover promptly to ensure their health.

In my country, with the development of technology and the improvement of living standards, electronic products such as mobile phones, tablets, laptops, and game consoles have become "necessities" in people's daily lives. At all times and in all corners of life, we can see people holding mobile phones, computers, or other electronic products, playing games, listening to music, and watching movies or television, and the vast majority of them are young and middle-aged men and women; "smartphone addicts" are ubiquitous. However, many are unaware that addiction to electronic products can lead to a decline in sexual function, thus affecting male fertility. Surveys show that couples who use electronic products for extended periods before bed experience a significant decrease in the frequency of their sexual activity. A US study indicates that addiction to electronic products is a major cause of severe sexual dysfunction in one-quarter of Americans. Therefore, it is understandable for men to use electronic products, but they must control their time and avoid addiction to prevent sexual dysfunction and infertility.