scars of friendship
There’s one other thing about us: we each have a scar in the shape of a cat or dog’s head on our right biceps. Michele, Rachel, and I have the profile of a roaring cat... The boys have the profile of a howling dog, but they don’t argue over what kind of dog it is. The scars are completely filled in, so we’ll never know what animals we have. But the scars are special; whenever one of us is in trouble... or seriously injured... the scars will bleed and hurt.
-From Chapter One of Back When We Were Dumb