Adultery is prohibited by the seventh of the Ten Commandments (Exodus 20:12) which simply says: It is forbidden for a man to have sexual relations with a married woman not his wife.
Voluntary sexual intercourse between a married woman, or one engaged by payment of the brideprice, and a man other than her husband.
[13] A man is not allowed to have sexual relations with a woman—including his wife—during and shortly after her menstrual period (Leviticus 18:19), until after she immerses in a mikveh.
Though they are generally called incestuous relations, the biblical list does not necessarily correspond to those prohibited under state laws.
In the Hebrew Bible, sexual relationships between siblings are forbidden to Jews but permissible to Gentiles (non-Jews).
[40] Jewish tradition also forbids marriage to a man who has been forcibly emasculated; the Greek term spadon (σπάδων; Latin: spado) which is used to refer to such people, is used in the Septuagint to denote certain foreign political officials (resembling the meaning of eunuch).
[38] There is dispute, even in traditional Judaism, about whether this prohibited group of men should include those who have become, at some point since their birth, emasculated as the result of a disease.
Orthodox Judaism interprets (Leviticus 18:22) as forbidding homosexual acts between two men, and calls it an abomination.
)[44] There is no punishment prescribed in the Torah for sex acts between two women (lesbianism), but rabbinic law has prohibited it as an extension of the "activities of (ancient) Egypt" (see Leviticus 18:3).
[47] Conservative Judaism's Committee on Jewish Law and Standards has validated different approaches to homosexual acts, with one opinion being like the Orthodox position in many respects, and another opinion permitting many forms of homosexual sex, while continuing to regard anal intercourse between men as prohibited.
[48] In 2012, the American branch of Conservative Judaism represented by the Rabbinical Assembly, devised a commitment ceremony for same-sex couples, though not defined as kiddushin.
[60] However, in Shulchan Aruch it is explained that an exception is added when girls ages 3 through 12 might be given to betrothal by their fathers under distressing situations of exile and persecution, but should be avoided when possible.
[63] Shulchan Aruch also states that the "deaf-mute", "insane", and "minors" are not fit agents for betrothal "because they are lacking in mental capacity", as such they cannot meaningfully consent.
[68] Sanhedrin interpreted that Leviticus 19:29 forbids marrying off one's daughter to an old man because it might lead her to engage in adultery, and the father is fully responsible for causing that situation.
[69][68] The Talmud also teaches that "those who marry minor girls who are not yet capable of bearing children" will "delay the coming of the messiah.