Changes in Your Penis as You Age

Just like any other aspect of your body, your penis undergoes a series of transformations as you journey through life. These changes, predominantly governed by testosterone levels, mark different stages of your sexual health evolution.

Between the ages of 9 and 15, hormonal signals from the pituitary gland trigger the onset of puberty, prompting the production of testosterone. This pivotal phase initiates the growth of various sexual characteristics, including the testes, scrotum, penis, and pubic hair. Testosterone levels reach their zenith during the late teens to early twenties, heralding peak physical development.

In subsequent years, testosterone levels may experience a slight decline, albeit minimal, from the late 20s through the 40s. However, beyond the age of 40, a gradual increase in a protein known as sex hormone binding globulin (SHBG) occurs. This protein binds to testosterone in the bloodstream, diminishing the amount available for bodily functions.

As testosterone diminishes, noticeable alterations manifest in several areas:

  1. Pubic Hair: Similar to hair elsewhere on the body, pubic hair may thin and acquire a grayish hue with age.
  2. Penis Size: While the actual size typically remains unchanged, an accumulation of fat in the pubic region can create an illusion of decreased size due to sagging.
  3. Penis Shape: Peyronie’s disease, characterized by a curved erection, can develop in some men due to physical trauma during sexual activity, resulting in scar tissue formation along the penis shaft.
  4. Testicles: As testosterone levels dwindle, sperm production slows down, and testicles may undergo shrinkage.
  5. Scrotum: The scrotum, responsible for regulating testicular temperature, may experience diminished muscle functionality and reduced elasticity, leading to increased sagging.
  6. Penis Function: Age-related declines in nerve sensitivity may contribute to arousal difficulties and orgasmic challenges. Erectile dysfunction becomes more prevalent as testosterone levels decrease, often resulting in difficulties maintaining rigidity during intercourse.

Commonly, the inability to retain blood in the penis leads to erectile issues, where initial arousal is achievable but sustaining an erection becomes problematic due to weakened surrounding muscle tissue.


Understanding that changes in sexual anatomy and function are natural aspects of aging is crucial. If these changes significantly impact your life and relationships, seeking medical advice is advisable, as effective treatments are available to address age-related sexual health concerns.

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