Rabbi Adin Steinsaltz writes:
Jewish tradition does not see sex, per se, as sinful.
In fact, in the right context, and when engaged in with conscious purpose, sex is seen as a positive commandment, a force of connection—because, in contrast to food and money, sexual pleasure in itself is not connected with ownership.
It is a pleasure that is derived from giving and being connected with another—both in the body and beyond the physical plane.
It can become a most meaningful expression of love, of charity and benevolence.
Sexual desire, possibly the most powerful human desire, can become an expression of holiness.
–Rabbi Adin Steinsaltz