Since middle age, many individuals experience a decline in sexual desire and testosterone levels, which often correlates with a decrease in their overall zest for life, hopes, and dreams. The enthusiasm for travel, adventure, business ventures, sports competitions, and ambitious goals diminishes, leading people to become accustomed to solitude and to pursue a more tranquil, low-risk lifestyle. Sometimes, they experience a sense of piety that may be attributed to their spiritual beliefs. This shift in attitude can be attributed to various factors, including cultural and socio-economic influences; however, biological factors also play a significant role. According to the evolutionary theory of aging, a person's physical and mental capabilities reach their peak during reproductive years. This suggests that natural selection favors traits that enhance survival and reproduction during these prime years, potentially at the expense of health and vitality in later life. It means that as long as we experience sexual desire, we maintain a stronger and healthier body, along with [...]