Deeper Explanation of Impotency (Erectile Dysfunction and Low Libido)
There is a difference between low libido and erectile dysfunction. However, they both relate to impotency, which often is used as a general term to talk about sexual inadequacies.
Erectile Dysfunction
More often than not, erectile dysfunction is referred to synonymously with impotency. In other words, often these are taken to mean the same thing and essentially they do. That is, at least one definition of impotency.
However, erectile dysfunction is not always related to the ability to become aroused when stimulated. Getting stimulated and aroused does always lead to getting an erection. This is true sometimes even when a man sees an attractive woman with all the right parts in all the right places.
The fact that not getting an erection when stimulated by sounds, touch, smells or tastes also proves that erectile dysfunction is a separate issue from having a low or poor libido. A man can have a sex drive but still may not be able to get or keep an erection long enough to enjoy sexual activity or please his partner.
Usually erectile dysfunction is a cause of interruption of nerve activity between the brain and the sexual organs. This could be a result of poor circulation and/or excess production of the PDE5 enzyme that drugs such as Viagra, Cialis, or Levitra are used to treat.
Low Libido
Low libido leads to varying degrees of disinterest in sex. It could mean total lack of sexual desire it could mean a man cannot get aroused when stimulated.
At the most extreme level (not necessarily considered bad depending upon the perspective) a person may be asexual. That individual may prefer to not have sex at all and has absolutely no desire for sex or to procreate at all.
This does not happen very often but it does happen. The stigma of being asexual may be attached to very negative statements such as suggesting that the person has serious psychological problems. On the other hand, a person who is asexual may be perfectly happy and content and not even think of it as an issue.
However, most of the time it is that an individual is temporarily lacking sexual desire. Again, this can happen even if a man has an erection. It may happen for days, weeks, or months at a time but it does not make a person asexual as in the case previously described.
Conclusion
Different aspects of impotency need to be treated in different ways. All men are different and should consult a doctor and research treatments that are best for him.