Hot on the heels of girl dinner comes girl math: a strategy for justifying large or unnecessary purchases. The calculations behind girl math aren't new, but the way we talk about those calculations — by rooting them in the collective experience of being a woman and the thrill of allowing yourself a treat or splurge — is. And while some people have shamed this trend as enabling overspending, girl math is just not that serious. For real. It's simply our silly way of justifying those purchases that we were going to make anyway. Instead of feeling shame about indulging every once in a while, girl math allows us to luxuriate in a new cashmere coat that we got with a gift card - which means it was basically free. Listen in as we girl math our way to feeling good as new.