In some men, there is an almost linear decline in testosterone production that becomes noticeable after the age of 40. However, many males experience no decline in testosterone levels. Both the decrease in testosterone and the decrease in sperm production causes an age-related decrease in fertility. The loss of testosterone also results in a decrease in bone and muscle mass in the aging male. The loss of testosterone may also contribute to sexual dysfunction with age in men.
Men experience a gradual decline in orgasmic activity after late adolescence.
There are also decreases in the strength and frequency of contractions during orgasm that reduce the force of your ejaculation. It also takes men much longer to achieve an orgasm as they age, which greatly reduces the incidence of premature ejaculation. While there is still some controversy, part of the age-related decline in male libido and potency can be attributed to the steady decline in testosterone that occurs with age. Testosterone stimulates growth of the gland as we age. As it grows, the prostate compresses the urethra resulting in symptoms of urinary obstruction.