I had always considered nipple rings to be ugly. Weird. Maybe even a little degrading. Until the moment I focused on the swaying movement of the gleaming pair of them attached to the woman whom my husband was fucking as he and I stared fixedly into each other's eyes, a few metres apart in our bedroom. Suddenly, in the intensity of the extraordinary moment, those metallic accoutrements on a woman I didn't know, and whose f...