"What if I played football?" I ask. As soon as it's out of my mouth, I feel stupid. Even suggesting it feels like I've overstepped some kind of invisible line we've all agreed not to discuss. We don't talk about how Mara is different from other girls. We don't talk about how Mara is gay but no one says so. But when I do stuff like this, I worry it gets harder for us all to ignore what's right in front of us. I direct my...