With the onset of old age, the sexual physiology of older men also changes. All five organs of the body undergo aging, including the sexual reproductive organs. However, the form of normal male fertility decline is fundamentally different from sexual physiology. It does not exist with the age-related fertility stop boundary, even after the age of 50, sperm formation is reduced, to more than 90 years old still continue to produce sperm. According to statistics, the number of sperm drops to 50% of that in adulthood between the ages of 50 and 70, and to 10% above the age of 80, while the level of androgens produced by the testes also decreases. The aging of the male reproductive organs in old age is characterized by a decrease in testicular capillaries, gradual sclerosis of arteries and veins, and insufficient local blood supply, causing thickening of the basement membrane of the testes and the intrinsic membrane of the varicocele, a decrease in the diameter of the varicocele, fibrosis between the tubes, and a decrease in the number of spermatozoa produced. Since the varicocele is the place where spermatozoa are produced, the decrease of spermatozoa production is caused by the decrease of spermatogenic function. Mesenchymal cells may undergo senescence and degenerative changes, and testosterone secretion decreases. At the same time, male pro-mesenchymal hormone and estradiol increase with age. With fibroplasia and sclerosis of the arterioles in the penile corpus cavernosum, the sexual physiological response of older men is bound to change, with erections caused by sensory stimulation being slower, taking longer, and requiring more direct contact. Most older men are unable to produce an effective stimulus response, i.e., penis, within a few minutes. Erections take longer and, if they do occur, they are not as firm as when they were younger. The most obvious physiological changes in the sexual response cycle in older men are concentrated in the orgasmic phase, which can manifest as a shortening of the orgasmic phase or even the absence of ejaculation. The absence of ejaculatory urgency during the orgasmic phase is quite common, and even if there is a recognizable first phase, the form of the response may be significantly different. Occasionally, it is seen that the inevitable ejaculatory urgency lasts only 1-2 seconds in the elderly (up to 3-4 seconds in the young); the second phase of the orgasmic phase has obvious physiological changes with the male aging process, with only 1-2 contractions, although the interval between the rhythmic contractions of the penile urethra is also 0.8 seconds. That characteristic contraction of the penis is reduced at the same time, the distance of semen ejaculation from the urethra is also shortened, and the scrotum becomes sparse and soft. The fading period of the sexual response cycle in older men also undergoes obvious physiological changes, with a prolonged inactivity period, usually several hours before a full re-erection, occasionally only to a few minutes, if this phenomenon is understood by older couples, they will not worry about it; if not, they may be forced to fail to re-erect during the inactivity period, leading to sexual dysfunction.