Libido is defined as a person’s sexual drive or desire for sexual activity.  In relation to science, all animals including humans have this so-called innate desire or longing for procreation. This inner desire is initially thought of as something biological in nature.  This is because a person’s hormonal levels are said to dictate whether a person has a sexual desire or drive for another.  Many scientists and psychologists also believe that it is human instinct to have libido and the desire for sexual activity and this is proven by the delicate balance of sexual hormones in the body.

The term “libido” was coined by Sigmund Freud and is said to have an evolutionary purpose.  This inner sexual desire is also considered to be dependent on testosterone levels in humans.  In the case of males, the more testosterone the man has, the higher will be his libido or sexual desire.  The same testosterone levels are also associated with aggressive behavior. This link between libido and human behavior have been studied by scientists in the past and up to the present and this is the main reason why many consider libido as something biological in nature.

With further studies on libido, the experts have also found out that the increase or decrease in sexual urge or desire does not only rely on biological factors such as hormonal levels.  Many experts also believe that libido may also be controlled by psychological and social factors.  Emotional stress from various causes is known to lower a person’s sex drive and is one of many psychological factors that can greatly affect libido. There are also cases wherein the level of libido or sexual desire is dictated by social factors such as peer pressure in adolescence and the desire for having intimacy with other people.  In the case of single people for example, their libido may increase along with the increase in attraction or infatuation with other people.