Mr. Mo, 44, divorced for over a year and remarried a woman 10 years his junior. His new wife is young and active, and has high expectations in their sex life.
Five months into their marriage, Mr. Mo often felt exhausted. He had no energy at work during the day, and when he got home at night, he still had to deal with his wife's "invitations" from time to time. It was a bittersweet experience.
A harmonious life can indeed enhance the relationship between husband and wife, but if one or both partners feel exhausted afterward, the result is often the opposite.
1. Frequent displays of affection between husband and wife are not necessarily good.
Many couples engage in frequent sexual activity after marriage, partly due to the initial sweetness of newlywed life, and partly to increase the chances of conception. Modern medicine believes that intercourse should be moderate, and that marital intimacy should be practiced in moderation, as appropriateness can indeed be beneficial to both physical and mental health.
It can help prolong life : A happy marriage is closely related to a fulfilling sex life. Many data show that loving families often have a positive impact on both physical and mental health.
It can relieve stress : Scottish researchers published a record of a sex life experiment in the journal Biopsychology and found that people who had sex responded better to stress than those who had engaged in other activities or abstained from sex.
It can improve sleep : Studies have shown that oxytocin released after sexual activity can promote sleep, and sufficient sleep is associated with a range of other health benefits, such as maintaining a healthy weight and blood pressure.

"Too much of a good thing can be bad," and excessive sexual activity is detrimental to health. Sexual activity consumes physical energy, and excessive energy expenditure inevitably leads to a decline in physical condition, which in turn affects mental state, causing a decline in thinking ability, memory, and analytical skills. Too frequent an activity can also cause organ fatigue and increase the burden on the central nervous system and organs, eventually leading to premature aging of bodily functions.
II. How often should sexual intercourse be performed for optimal health?
Harmonious sexual activity should be done "within one's capacity," but different people have different physical conditions, ages, and mental states, so the frequency will naturally vary. So, is there a standard reference for the frequency of sexual activity?
The American magazine *Women's Health* once published a frequency formula, based on American scholars' findings on the impact of age on sexual ability. The formula is: Frequency = First digit of age × 9. For example, for people aged 40-49, the frequency = 4 × 9 = 36, meaning they could have sex 6 times in 30 days.

Of course, the number calculated by the formula is only a basic standard value. Modern medicine believes that there are three main criteria for judging normal frequency:
1. It arises naturally, not reluctantly or perfunctorily;
2. The entire process proceeded and was completed naturally, without any discomfort.
3. Neither party felt tired the next day, felt energetic, had no trouble sleeping, and felt relaxed and happy.
III. Note: Excessive female libido may be a medical condition.
Excessive desire can develop into hypersexuality, where the desire and impulse for "that thing" are excessively strong, which is actually a pathological tendency. Hypersexuality is mainly caused by increased central nervous system excitability, and specific contributing factors can be categorized as follows:
Physiological factors are often secondary to neuroendocrine disorders caused by certain diseases, such as hyperthyroidism, which may manifest as sexual arousal in its early stages; organic dementia, epilepsy, and other systemic dysfunctions can lead to weakening of the nerves that inhibit sexual arousal.
Psychological factors : being stimulated by a certain culture or video, leading to a prolonged state of excitement; or having a mental illness, fearing the loss of a spouse, and developing a strong possessive desire.
Drug and food factors : Direct use of gonadotropin-releasing drugs can lead to an increase in these hormones in the body; or eating certain foods can lead to increased libido.

Excessive desires should first be investigated to identify the underlying cause before treatment, rather than allowing them to fester and negatively impact physical and mental health. The most beautiful bond between husband and wife is one of deep affection that lasts a lifetime. Learning more about relationships will help you better understand each other.
References:
[1] Yin Xuebing; What is the relationship between sexual frequency and infertility? Self-care [J]. 2009.02
[2] Hypersexuality is not a sign of strong ability; it's a medical condition that needs treatment! (Dingding Xiaoyun, 2019-04-15)