Among the definitions of lack of sexual desire, as well as interest in sex and the desire to engage in the most disputes in the last fifteen years, causes asexuality.
If one starts from the definition of a person's sexuality, then its opposite should be defined as the lack of a physiological and emotional need for sexual intercourse.
Medical aspects of asexuality
According to some experts, asexuality is a kind of sexual orientation and fits in one line with heterosexuality, homosexuality and bisexuality, especially since there are entire "asexual" communities.
Researchers from the University of British Columbia (Vancouver, Canada) concluded that asexuality is neither a psychiatric condition nor a symptom of a psychological disorder of a sexual nature. And the classification criteria give grounds to refer this state to a special sexual orientation.
On the other hand, according to DSM-IV (Diagnostic and Statistical Manual of Mental Disorders), sexual desire disorders - hypoactive sexual desire disorder and inhibited sexual desire - are classified under "Sexual and gender personality disorders", which are characterized as the absence of sexual fantasies and the desire for sexual activity.
But already in DSM-V5 there were made changes and comments, which boil down to the following. For sexual desire disorders to be regarded as dysfunction, they must be accompanied by clinically significant mental and physiological changes and cause severe anxiety and serious interpersonal difficulties. However, these disorders should not be explained by any other mental disorders, the effects of medications, some other diseases or asexuality.
Thus, the main difference between these sexual dysfunctions and asexuality is that patients with impairments suffer from a lack of sexual desire, and people who consider themselves asexuals do not care.
Practically inferring this state beyond the bounds of medical problems, experts recommend not introducing confusion by associating a low threshold of sexual excitability in women with a lack of physiological and emotional need for sexual intercourse, that is, frigidity and asexuality. Although frigidity is considered a hypoactive disorder of sexual desire, very often - idiopathic.