Sexual fantasy

A sexual fantasy, or erotic fantasy, is an autoerotic mental image or pattern of thought that stirs a person's sexuality and can create or enhance sexual arousal. A sexual fantasy can be created by the person's imagination or memory, and may be triggered autonomously or by external stimulation such as erotic literature or pornography, a physical object, or sexual attraction to another person. Anything that may give rise to sexual arousal may also produce a sexual fantasy, and sexual arousal may in turn give rise to fantasies.

Sexual fantasies are nearly universal, being reported in many societies across the globe. However, because of the nature of some fantasies, the actual putting of such fantasies into action is far less common, due to cultural, social, moral, and religious constraints. In some cases, even a discussion by a person of sexual fantasies is subject to social taboos and inhibitions. Some people find it convenient to act out fantasies through sexual roleplay. A fantasy may be a positive or negative experience, or even both. It may be in response to a past experience and can influence future sexual behavior. A person may not wish to enact a sexual fantasy in real life, and since the process is entirely imaginary, they are not limited to acceptable or practical fantasies, which can provide information on the psychological processes behind sexual behavior.

Sexual fantasy can also pertain to a genre of literature, film or work of art. Such works may be appreciated for their aesthetics, though many people may feel uncomfortable with such works. For example, women in prison films may be described as sexual fantasies. A person may find validation of a sexual fantasy by viewing the depiction or discussion of a sexual fantasy in film, usually of a pornographic nature. In the case of films, the term may describe a part of the film, such as a fantasy scene or sequence. Besides pornographic films, a number of mainstream films have included sexual fantasy scenes, such as Business Is Business (1971), Amarcord (1973), American Beauty (1999) and others. In many cases, the use of fantasy scenes enables the inclusion of material into a work indicating the sexualized mental state of a character.

It is difficult to objectively identify and measure the nature of sexual fantasies, so that many studies deal with conscious fantasies when a person is awake, using one of three techniques:

To measure the reliability of a person's reporting of fantasies, researchers may compare a person's reported sexual arousal against actual measures of arousal, using techniques such as vaginal photoplethysmography, penile strain gauges, or other tools, such as genital pulse amplitude, genital blood volume, and heart rate. A 1977 study found that males judged arousal based on blood volume far better than females, and that males and females were equal when judging arousal based on pulse amplitude measures. Additionally, females were better at judging low arousal.

As with studies of sex in general, samples used in studies may be too small, not be fully random, or not fully representative of a population. This makes similarities between studies especially important. Women may be prone to underreporting the frequency of fantasy because they do not realize that they are becoming aroused, or they will not say that they are; one common problem is that they will imagine romantic imagery and become aroused, but not report the fantasy because it is not sexually explicit. Many studies are modern and are carried out in Western society, which, through factors like gender roles and taboo, are not widely representative, raising the need for more studies in different societies and historical eras. With regards to age, there is very little knowledge of sexual fantasies in children aged 5 to 12, and there is a need for longitudinal studies across a life span. Sex is often a taboo topic, so conducting a truly honest and representative example can be difficult in some areas. For example, a 1997 study on South Asian gay men found that almost 75% were afraid of being "found out", which complicates studies.

The scenarios for sexual fantasies vary greatly between individuals and are influenced by personal desires and experiences, and can range from the mundane to the bizarre. Fantasies are frequently used to escape real-life sexual restraints by imagining dangerous or illegal scenarios, such as rape, castration, or kidnapping. They allow people to imagine themselves in roles they do not normally have, such as power, innocence and guilt. Fantasies have enormous influence over sexual behavior and can be the sole cause of an orgasm. While there are several common themes in fantasies, any object or act can be eroticized.

Sexual fantasies are increasingly viewed as a necessary component to a healthy relationship. Accordingly, theorists have argued that fantasies may be used to encourage and promote sexual pleasure between partners. Researchers have additionally found a positive correlation between instances of sexual fantasizing and increased orgasm, arousal, and general contentment. The relative benefits of sexual fantasies are summarized in a statement by Stroller; "sexual fantasies are a private pornography in which we rehearse over and over again needs that are nearly impossible to fulfil in actual sex". Sexual fantasizing therefore allows an individual to fulfil desires that cannot be realistically achieved. In this sense, researchers assert that fantasizing about extra-marital, or multiple-partner sex is positively correlated with long-term partnerships. As such, sexual fantasies are viewed as means to combat sexual dissatisfaction.