Hair Tonic Ad / Wellcome ImagesBefore I had brain surgery, my friend Helen offered to shave her head in solidarity. But the surgeon didn't shave off much hair, so she didn't have to. He made an arc-shaped door to my head behind my hairline on the left side, and shaved just the area around it. After surgery, I looked like a wacked punk rocker for a while, shorn on one side. Now I have scars in my hair like a door.