Harvard University

I’m hiding behind the swing door of the dressing room when I text my mom just one word: “Traumatizing!” I’m on a bra-shopping expedition with my grandmother, and just in case it’s not abundantly clear, this trip was Not. My. Idea. Bra shopping has always been shrouded in mystery for me, and growing up in a household with two moms and two younger sisters hasn’t helped one bit: One of my moms doesn’t wear bras; the other proudly proclaims that her bras are older than me. A two-mom family without the faintest idea what a teenage girl needs—par for the course around here. So when my 78-year-old…