Has the desire for sex greatly decreased? No man wants to go through this. Not only can this affect men physically, but it can affect men mentally and emotionally as well. Having a low sex drive is not a choice but a hormonal change in the body that is causing men to feel this way.  

Testosterone makes male sex organs grow when developing from boys to grown men. Sexual excitement is caused in part by a rise in testosterone as levels rise and fall throughout the day. Some men notice they are more easily excited when testosterone is high, which is usually in the morning.

While low testosterone is a common cause of low sex drive in men, there are a variety of other possible causes. Psychological causes can contribute or cause low libido in men. These include anxiety, depression, stress, or relationship problems. In addition to low testosterone, there is also a variety of other physical causes that can result in a decreased sex drive. They may include being overweight, having a chronic illness, or taking medications such as opiates, beta-blockers, or antidepressants.

In the case of a low sex drive due to low levels of testosterone, increased testosterone levels from the hormone replacement therapy can often increase sex drive and performance. Once testosterone levels are maintained at a balanced level, there may be a noticable immediate change in sex drive.