Editing Libido (section)

== Sexual desire disorders ==
{{See also|Hyposexuality|Hypersexuality}}
Sexual desire disorders are more common in women than in men,<ref>{{Cite journal|last1=Segraves|first1=K. B.|last2=Segraves|first2=R. T.|date=2008|title=Hypoactive Sexual Desire Disorder: Prevalence and Comorbidity in 906 Subjects|journal=Journal of Sex & Marital Therapy|language=en|volume=17|issue=1|pages=55–58|doi=10.1080/00926239108405469|pmid=2072405|issn=0092-623X}}</ref> and women tend to exhibit less frequent and less intense sexual desires than men.<ref>{{Cite journal|last1=Baumeister|first1=Roy F.|last2=Catanese|first2=Kathleen R.|last3=Vohs|first3=Kathleen D.|date=2001|title=Is There a Gender Difference in Strength of Sex Drive? Theoretical Views, Conceptual Distinctions, and a Review of Relevant Evidence|journal=Personality and Social Psychology Review|language=en|volume=5|issue=3|pages=242–273|doi=10.1207/S15327957PSPR0503_5|s2cid=13336463|issn=1088-8683}}</ref> [[Erectile dysfunction]] may happen to the penis because of lack of sexual desire, but these two should not be confused since the two can commonly occur simultaneously.<ref name="malelacksexdrive">{{cite web |url=http://www.netdoctor.co.uk/sex_relationships/facts/malelacksexdrive.htm |title=Lack of sex drive in men (lack of libido) |access-date=July 28, 2010 |archive-date=September 24, 2015 |archive-url=https://web.archive.org/web/20150924004540/http://www.netdoctor.co.uk/sex_relationships/facts/malelacksexdrive.htm |url-status=dead }}</ref> For example, moderate to large recreational doses of [[cocaine]], [[amphetamine]] or [[methamphetamine]] can simultaneously cause erectile dysfunction (evidently due to [[vasoconstriction]]) while still significantly increasing libido due to heightened levels of dopamine.<ref name="Human amph effects">{{cite book | author=Gunne LM | title=Drug Addiction II: Amphetamine, Psychotogen, and Marihuana Dependence | date=2013 | publisher=Springer | location=Berlin, Germany; Heidelberg, Germany | isbn=9783642667091 | pages=247–260 | chapter-url=https://books.google.com/books?id=gb_uCAAAQBAJ&pg=PA247 | access-date=4 December 2015 | chapter=Effects of Amphetamines in Humans }}</ref> Although conversely, excessive or very regular/repeated high-dose amphetamine use may damage [[leydig cells]] in the male [[testes]], potentially leading to markedly lowered sexual desire subsequently due to [[hypogonadism]]. However, in contrast to this, other [[stimulants]] such as cocaine and even [[caffeine]] appear to lack negative impacts on testosterone levels, and may even increase their concentrations in the body. Studies on [[Cannabis (drug)|cannabis]] however seem to be exceptionally mixed, with some claiming decreased levels on testosterone, others reporting increased levels, and with some showing no measurable changes at all. This varying data seems to coincide with the almost equally conflicting data on cannabis' effects on sex drive as well, which may be dosage or frequency-dependent, due to different amounts of distinct [[cannabinoids]] in the plant, or based on individual enzyme properties responsible for metabolism of the drug. Evidence on [[Alcohol (drug)|alcohol]]'s effects on testosterone however invariably show a clear decrease, however (like amphetamine, albeit to a lesser degree); temporary increases in libido and related sexual behavior have long been observed during [[alcohol intoxication]] in both sexes, but likely most noticeable with moderation, particularly in males. Additionally, men often also naturally experience a decrease in their libido as they age due to decreased productions in testosterone.

The [[American Medical Association]] has estimated that several million US women have a [[female sexual arousal disorder]], though arousal is not at all synonymous with desire, so this finding is of limited relevance to the discussion of libido.<ref name="A"/> Some specialists claim that women may experience low libido due to some hormonal abnormalities such as lack of [[luteinising hormone]] or androgenic hormones, although these theories are still controversial.