And remember that many aspects of sexual interest and libido are in the brain, not just the body.
It gets shorter and the walls get thinner.
To further complicate things, using a condom, the best protection against disease, can be uncomfortable due to dryness.
Men are not immune to age-related sexual problems.
Be sure to talk with your doctor about the potential risks of taking testosterone, including a higher risk of prostate cancer.
Low estrogen levels can lead to thinner vaginal walls, increasing the risk of tears during sex and sometimes causing itching, burning and dryness.