I turned fifty-seven this year and with sixty on the near horizon, my thoughts have more than ever turned to aging and what it means to me. I find myself marveling at how fast days become weeks, months, years, and decades. Doing the math with my memories frequently shocks me – as in, “It’s been fifteen years since I broke up with him?!,” “My mom died nineteen years ago?!,” “Whose face is that in my mirror?!,” “What exactly is retinol, anyway?!,” and so on…