Through the unique setup of marriage, bonding two people in a bulwark against the rest of the world, we are assured that we are irreplaceable and a key part of the world, the world we have claimed for ourselves. This is the source of marriage's sanctity, security, and holiness. We are the sun, and our spouse is the planet that revolves around us and basks in our light, in the same way that we are part of our spouse's universe. But, it is up to us to recognize this commitment. And act upon it.

Shmuley Boteach, Kosher Sex