During arguments between my parents over my mother's habit of walking around naked, my mother often told my father it was his fault because he was the one who encouraged her to go topless for the first time and made her discover how pleasurable it was. I didn't understand what she was referring to, and only recently, when my sister found a box full of old slides that had immortalized their summer vacations from the years before we were born, did I realize what she was talking about. In every photo, Mom was either topless or naked, and judging by the expression on his face, my father wasn't at all displeased about it.