From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Aphrodisiac

An aphrodisiac is a substance that increases sexual desire, sexual attraction, sexual pleasure, or sexual behavior. Substances range from a variety of plants, spices, foods, and synthetic chemicals. Therefore, they can be classified by their chemical properties (i.e., substances that are natural and unnatural). 

Natural aphrodisiacs like alcohol are further classified into plant-based and non-plant-based substances. Unnatural aphrodisiacs like ecstasy are classified as those that are manufactured to imitate a natural substance. Aphrodisiacs can also be classified by their type of effects (i.e., psychological or physiological). Aphrodisiacs that contain hallucinogenic properties like Bufo toad have psychological effects on a person that can increase sexual desire and sexual pleasure. Aphrodisiacs that contain smooth muscle relaxing properties like yohimbine have physiological effects on a person that can affect hormone levels and increase blood flow.

Substances which only affect a person's behavior are susceptible to the placebo effect. Placebo effects are defined as strong beliefs that manifest themselves and therefore are misconstrued to confirm a false positive. It is commonplace to see the placebo effect in the debate on why aphrodisiacs work; those that argue for the placebo effect say that individuals want to believe in the effectiveness of the substance. Other substances that impede on areas that aphrodisiacs aim to enhance are classified as anaphrodisiacs.

Both males and females can benefit from the use of aphrodisiacs, but they are more focused on males as their properties tend to increase testosterone levels rather than estrogen levels. This is in part due to the historical context of aphrodisiacs, which focused solely on males. Only recent attention has been paid to understanding how aphrodisiacs can aid female sexual function. In addition, cultural influence in appropriate sexual behavior from male and females also play a part in the research gap.

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