Sexual arousal 159243 226013250 2008-07-16T13:08:41Z Atomaton 1217613 [[WP:UNDO|Undid]] revision 226011786 by [[Special:Contributions/116.74.96.218|116.74.96.218]] ([[User talk:116.74.96.218|talk]]) '''Sexual arousal''' is the process and state of an animal being ready for [[sexual activity]] and feeling an urge for sexual contact. == Human sexual arousal == Sexual arousal for a man results in an increased blood flow to the penis, to produce an [[erection]]. In a woman, the [[vagina]] becomes [[Skene's gland|lubricated]] in anticipation of [[sexual intercourse]]. Unlike most animals, [[human]] beings of both sexes are potentially capable of sexual arousal throughout the year; therefore, there is no human [[mating season]]. Things that precipitate human sexual arousal are colloquially known as '''turn-ons'''. Turn-ons may be physical or mental in nature. Given the right stimulation, sexual arousal in humans will typically end in an [[orgasm]], but may be pursued for its own sake, even in the absence of an orgasm. Sexual arousal causes different physical changes. {| class=wikitable |- !style="width:50%"|In females: !In males: |- | *Increase in [[breast]] size *Erection of [[nipples]]<ref> http://encarta.msn.com/encyclopedia_761580700_3/Human_Sexuality.html </ref> *[[Vaginal lubrication]] *[[Vasocongestion]] of the [[vagina]]l walls *[[Tumescence]] and [[erection]] of the [[clitoris]] and [[labium (genitalia)|labia]] *Elevation of the [[cervix]] and [[uterus]], and expansion of the back of the [[vagina]] *Change in shape, color and size of the [[labia majora]] and [[labia minora]] | *[[Penile tumescence]] and [[erection]] (usually the most prominent and reliable sign of sexual arousal in males; however, [[adolescence|adolescent]] males experience frequent 'non-sexual' erections stemming from their high level of [[testosterone]].) *Retraction and tightening of the [[foreskin]], often exposing the [[glans penis]] if not normally exposed (only if the particular male is not circumcised) *Emission of [[pre-ejaculatory fluid]] *Swelling of the [[testes]] *Ascension of the [[testes]] *Tensing and thickening of the [[scrotum]] |} === Human sexual response cycle === {{main|Human sexual response cycle}} During the 1950s and 1960s, [[Masters and Johnson|William H. Masters and Virginia E. Johnson]] conducted many important studies within the field of [[human sexuality]]. In 1966, the two released a book, ''Human Sexual Response'', detailing four stages of physiological changes in humans during sexual stimulation. These phases, in order of their occurrence, are excitement, plateau, orgasmic, and resolution.<ref>{{cite web | url = http://www.soc.ucsb.edu/sexinfo/?article=activity&refid=034 | title = The Sexual Response Cycle | accessdate = 2007-04-24 | work = SexInfo | publisher = University of California, Santa Barbara | quote = Masters and Johnson's Four-Phase Model: The sexual responses of men and women have many similarities.... }}</ref> ===Singer's model of sexual arousal=== Singer<ref name="singer">Singer, B. Conceptualising sexual arousal and attraction. The [[Journal of Sex Research]]. 1984; 20, 230-240</ref> presents a model of the process of sexual arousal, in which he conceptualized human sexual response to be composed of three independent but generally sequential components. The first stage, ''aesthetic response,'' is an emotional reaction to noticing an attractive face or figure. This emotional reaction produces an increase in attention toward the object of attraction, typically involving head and eye movements toward the attractive object. The second stage, ''approach response,'' progresses from the first and involves bodily movements towards the object. The final ''genital response'' stage recognizes that with both attention and closer proximity, physical reactions result in genital tumescence. Singer also notes that there is an array of other autonomic responses, but acknowledges that the research literature suggests that the genital response is ''the most reliable and convenient to measure'' in males. === Erectile dysfunction === [[Erectile dysfunction]] (ED) or impotence is a sexual dysfunction characterized by the inability to develop or maintain an erection of the penis. There are various underlying causes, such as damage to the nervi erigentes which prevents or delays erection, or diabetes, which simply decreases blood flow to the tissue in the penis, many of which are medically reversible. The causes of erectile dysfunction may be psychological or physical. Psychological impotence can often be helped by almost anything that the patient believes in; there is a very strong placebo effect. Physical damage is much more severe. One leading physical cause of ED is continual or severe damage taken to the nervi erigentes. These nerves course beside the prostate arising from the sacral plexus and can be damaged in prostatic and colo-rectal surgeries. Due to its embarrassing nature and the shame felt by sufferers, the subject was taboo for a long time, and is the subject of many urban legends. Folk remedies have long been advocated, with some being advertised widely since the 1930s. The introduction of perhaps the first pharmacologically effective remedy for impotence, sildenafil (trade name [[Viagra]]), in the 1990s caused a wave of public attention, propelled in part by the news-worthiness of stories about it and heavy advertising. The Latin term [[impotentia coeundi]] describes simple inability to insert the [[penis]] into the vagina. It is now mostly replaced by more precise terms. == Sexual arousal in animals == While human sexuality is well understood, scientists do not completely grasp how other animals relate sexually. However, current research studies suggest that many animals, like humans, enjoy sexual relations that are not limited to reproduction. [[Dolphin]]s and [[Bonobo]]s, for example, are both well known to use sex as a "social tool to strengthen and maintain bonds."<ref>{{cite video | people = McCarey, Kevin (writer) | year = 1999 | title = Dolphins: The wild side | url = http://www.nationalgeographic.com/tv/press/990202.html | medium = Documentary | publisher = National Geographic Television | location = USA | accessdate = 2007-04-24 | time = }} "Like humans and some chimpanzees, dolphins use sex for reasons other than procreation. Sex is as frequent as it is casual, a social tool used to strengthen and maintain bonds." {{imdb title|0386415|''Dolphins: The wild side''}}</ref> == See also== * [[Aphrodisiac]] * [[Barosmia]] * [[Erotica]] * [[Hypersexuality]] * [[Human sexuality]] * [[Impotence]] * [[Inhibited sexual desire]] * [[Kinsey report]] * [[Persistent sexual arousal syndrome]] * [[Sexual arousal disorder]] * [[Sexual attraction]] * [[Sexual desire]] * [[Sexual frustration]] * [[Sexual intercourse]] * [[Sexual orientation]] ==References== {{reflist}} {{sex}} [[Category:Sexual arousal]] [[Category:Sexual emotions]] [[ar:إثارة جنسية]] [[cs:Sexuální vzrušení]] [[da:Liderlighed]] [[de:Sexuelle Erregung]] [[et:Seksuaalne erutus]] [[es:Excitación]] [[fr:Excitation sexuelle]] [[lt:Lytinis susijaudinimas]] [[nl:Seksuele opwinding]] [[ja:性的興奮]] [[no:Seksuell opphisselse]] [[pl:Pobudzenie seksualne]] [[ru:Половое возбуждение]] [[fi:Kiihottuminen]] [[sv:Sexuell upphetsning]] [[zh:性刺激]]