Is marriage a contract that involves sex in any way?
Miguel Valdespino is spot on. In a traditional Jewish ceremony, a big part of it is the signing of the (Ketubah). It specifies the amount of sex to which a married woman is entitled. That amount varied traditionally, based on the occupation of the husband. If I recall correctly, it was something like a couple of times a week for a farmer or herder, at least once a month for a trader (who might be traveling), and daily for the wife of a "rich man" - one who didn't have manual labor detracting from his abilities to perform. Per Judaism 101: Kosher Sex Sex should only be experienced in a time of joy. Sex for selfish personal satisfaction, without regard for the partner's pleasure, is wrong and evil. A man may never force his wife to have sex. A couple may not have sexual relations while drunk or quarreling. Sex may never be used as a weapon against a spouse, either by depriving the spouse of sex or by compelling it. It is a serious offense to use sex (or lack thereof) to punish or manipulate a spouse. Sex is the woman's right, not the man's. A man has a duty to give his wife sex regularly and to ensure that sex is pleasurable for her. He is also obligated to watch for signs that his wife wants sex, and to offer it to her without her asking for it. The woman's right to sexual intercourse is referred to as onah, and it is one of a wife's three basic rights (the others are food and clothing), which a husband may not reduce. TheTalmud specifies both the quantity and quality of sex that a man must give his wife. It specifies the frequency of sexual obligation based on the husband's occupation, although this obligation can be modified in the ketubah (marriage contract). A man may not take a vow to abstain from sex for an extended period of time, and may not take a journey for an extended period of time, because that would deprive his wife of sexual relations. In addition, a husband's consistent refusal to engage in sexual relations is grounds for compelling a man to divorce his wife, even if the couple has already fulfilled thehalakhic obligation to procreate. Although sex is the woman's right, she does not have absolute discretion to withhold it from her husband. A woman may not withhold sex from her husband as a form of punishment, and if she does, the husband may divorce her without paying the substantial divorce settlement provided for in the ketubah. Although some sources take a more narrow view, the general view of halakhah is that any sexual act that does not involve sh'chatat zerah (destruction of seed, that is, ejaculation outside the vagina) is permissible. As one passage in the Talmud states, "a man may do whatever he pleases with his wife." (Nedarim 20b) In fact, there are passages in the Talmud that encourage foreplay to arouse the woman. (Nedarim 20a). Any stories you may have heard about Jewish sex occurring through a hole in a sheet are purely an urban legend.