The dictionary definition is as below, but there are several activities involving Fetishes that include Chastity.
— n 1. the state of being chaste; purity 2. abstention from sexual intercourse; virginity or celibacy: a vow of chastity
[from Old French chasteté, from Latin castitās, from castus chaste]
Chastity is sexual behavior of a man or woman that is acceptable to the moral standard or guidelines of that persons culture, civilization or religion.
In average Western culture, the word Chastity has become associated with abstinence from sex, but when Chastity is to be put into a Fetish context, it could also be taken to include abstinence from some or all sexual activity, because of the Domination instructions of your Domme. Or in the context of Swinging, it could be taken to mean abstinence from certain activities whilst not with your significant partner.
Today, chastity belts are sometimes used in BDSM play and in consensual fetish relationships, involving Submission and Domination. They are a means for the wearer to surrender control over their sexual behavior either for sexual play, or as a long-term method of preventing infidelity or masturbation. They range from simple leather or plastic toys commonly sold by adult stores to expensive high-security stainless steel devices made by a handful of specialist firm.
Chastity can also cross over with the activity of Erotic Sexual Denial
There is of course, the Chastity Belt, this is a locking item of clothing designed to prevent sexual intercourse.
Some devices have even been designed with additional features to prevent masturbation. Chastity belts exist for both male and female.
According to modern myths the chastity belt was used as an anti-temptation device during the Crusades. When the knight left for the Holy Lands on the Crusades, his Lady would wear a chastity belt to preserve her faithfulness to him. However, there is no credible evidence that chastity belts existed before the 15th century (more than one hundred years after the last of the Crusades), and their main period of apparent use falls within the Renaissance rather than the Middle Ages.
In any case, Renaissance chastity belts were said to have had padded linings (to prevent large areas of metal from coming into direct prolonged contact with the skin), and these had to be changed fairly frequently, so that such belts were not practical for uninterrupted long-term wear. Uninterrupted long-term wear could have caused infection, abrasive wounds, sepsis and eventual death.
The words "chaste" and "chastity" stem from the Latin adjective castus meaning "pure". The words entered the English language around the middle of the 13th century; at that time they meant slightly different things. "Chaste" meant "virtuous or pure from unlawful sexual intercourse" usually referring to pre/extramarital sex], whilst "chastity" meant "virginity". It was not until the late 16th century that the two words came to have the same basic meaning as a related adjective and noun.
In Jewish, Christian, Islamic, and Baha'i beliefs, acts of sexual nature are restricted to marriage. For unmarried persons, chastity is identified with pre/extra marital sexual abstinence. Sexual acts outside or apart from marriage, such as adultery, fornication and prostitution, are considered sinful.
In Christianity as a Religious tradition, chastity is considered to be synonymous with sexual purity. In this context, chastity means not having any sexual relations before marriage. It also means fidelity to husband or wife during marriage.
In Christian and Catholic marriage, the spouses commit to each other for a lifelong relationship which excludes sexual intimacy with other persons. Within marriage, various Abrahamic religions consider several practices to be considered unchaste, such as sexual intimacy during or shortly after menstrual cycle or childbirth, Leviticus 12:2, 15:24, 20:18.
In Catholicism, chastity is placed opposite one of the Seven deadly sins lust, and is classified as one of seven virtues.
Roman Catholics perceive sex within marriage as chaste, but prohibit the use of artificial contraception as an offense against chastity, seeing contraception as unnatural, as well as contrary to God's will.
Many Anglicanism communities allow for artificial contraception, seeing the restriction of family size as possibly not contrary to God's will.
A stricter view is held by the "Shakers", who prohibit marriage as well as sexual intercourse under any circumstances, this is all seen as a violation of chastity.
The Catholic Church has set up various rules regarding clerical celibacy, while most Protestant communities allow clergy to marry.
Hinduism's view on premarital sex is rooted in its concept of the stages of life. The first of these stages, known as Brahmacharya, roughly translates as chastity. Celibacy is considered the appropriate behavior for both male and female students during this stage, which precedes the stage of the married householder. Many Sadhus (Hindu monks) are also celibate as part of their asceticism|ascetic discipline.
The teachings of Buddhism include the Noble Eightfold Path, plus the Five Precepts ethical code, Upāsaka and Upāsikā, lay followers should abstain from sexual misconduct, while Bhikkhu and Bhikkhuni monastics should practice strict chastity.
The Five Precepts (Taoism) of the Daoist religion include No Sexual Misconduct, which is interpreted as prohibiting extramarital sex for lay practitioners and marriage or sexual intercourse for monks and nuns.