Under Jewish tradition, sex is advised on the sabbath.
In Jewish law, sex is not considered shameful, sinful or obscene. Sex is not thought of as a necessary evil for the sole purpose of procreation. Although sexual desire comes from the yetzer ra (the evil impulse), it is no more evil than hunger or thirst, which also come from the yetzer ra. Like hunger, thirst or other basic instincts, sexual desire must be controlled and channeled, satisfied at the proper time, place and manner. But when sexual desire is satisfied between a husband and wife at the proper time, out of mutual love and desire, sex is a mitzvah.
Sex is permissible only within the context of a marriage. In Judaism, sex is not merely a way of experiencing physical pleasure. It is an act of immense significance, which requires commitment and responsibility. The requirement of marriage before sex ensures that sense of commitment and responsibility. Jewish law also forbids sexual contact short of intercourse outside of the context of marriage, recognizing that such contact will inevitably lead to intercourse.
The primary purpose of sex is to reinforce the loving marital bond between husband and wife. The first and foremost purpose of marriage is companionship, and sexual relations play an important role. Procreation is also a reason for sex, but it is not the only reason. Sex between husband and wife is permitted (even recommended) at times when conception is impossible, such as when the woman is pregnant, after menopause, or when the woman is using a permissible form of contraception.