“There are many reasons that I wish I had played Dungeons and Dragons, or any RPG for that matter, when I was younger. Sure, it wouldn’t have garnered me much in the way of cool points, but I’d ostensibly revoked mine at the door by dressing like a hippie and burying my face in books.” The game requires doing simple math, and connecting that with the fun of role-playing means D&D players get good at it.