One of the commandments in the Halachah is to be fruitful and multiply (Gen 1:28; 8:17; 35:11). The extreme ascetic view sees sexual relations as appropriate only for the purpose of procreation, and it is thus a necessary evil. The view that predominates in the Halachah, however, is that sexual intercourse for the pleasure of the married couple is wholesome and good. - Appropriate only in marriage.
Traditional Judaism adheres to the prohibition on women of engaging in sexual intercourse for seven days following the cessation of the bleeding of menstruation. After this a woman must immerse herself in a mikvah.
There are a considerable number of sexual taboos that are specific mitzvot in the 613 commandments of the Torah. They are drawn from Leviticus 18:6-24; they are prohibitions essentially against all forms of adultery, incest, homosexuality and bestiality.
Progressive Judaism does not see the Torah as eternally binding, but in need of reinterpretation to accommodate the real-life situations of modernity. The strict Orthodox position, on the other hand, is that the Torah provides God's law and offers all the answers to face modernity with a counter-cultural courage.
Were it not for the evil impulse, no man would build a house, take a wife, beget a child, or engage in business. - Genesis Rabbah 9:9.
He who is twenty years of age and is not married spends all his days in sin. - Bavli Kiddushin 29b-30a.
Everything which a man wishes to do with his wife, he may do. - Bavli Berachot 62a.
When a husband unites with his wife in holiness, the divine presence abides with them. - Bavli Sotah 17a.