Sexual life begins with sexual excitement on both sides and ends with orgasm. Under normal circumstances, the duration is approximately 5 to 15 minutes. "First, the blood vessels of the sexual organs become congested, and then there is a strong reflex muscle contraction. At this time, many organs and tissues of the body are also involved in this special physiological process, such as faster heartbeat, higher blood pressure, deeper breathing, skin vascular dilation, and increased sweating.".
Therefore, the body's energy consumption significantly increases and metabolism increases. If the duration of each sexual activity lasts too long, it can cause fatigue due to excessive energy consumption, and even lead to mental fatigue, general fatigue, muscle soreness, and other discomfort, which seriously affects the work and life of the next day.
Prolonged sexual life can also increase the incidence of various diseases. "Because the sexual organs of both sides are in close contact with each other in a highly congested state, if the time is too long, women are more likely to cause urinary tract infections and menstrual disorders, while men are more likely to cause prostatitis.".
So, how long does sex last before it's called "too long"? Due to individual differences, the time difference required for sexual life can be several times or dozens of times. Generally speaking, this "degree" is appropriate as long as two people do not feel obvious discomfort the next day and do not affect normal work and life.