I have pinpointed the moment when I fell in love. Science class, I was bent over to write something down. She starts writing on the back of my neck in pen. "I have marked you. You are mine now" she says. Friend makes noise. "Oh come on. I didn't mean it like that" says the girl I'm in love with. And she didn't. But that's how my brain processed it. She marked me. Now I'm hers.