"It must be because you're so approachable", I say flatly. "You know, like a bed of nails." He stares at me, and I don't look away. He isn't a dog but the same rules apply. Looking away is submissive. Looking him in the eye is a challenge. It's my choice. Heat rushes into my cheeks. What will happen when this tension breaks? But he just says, "Careful, Tris."

Source: Veronica Roth (2013). “The Divergent Series Complete Collection: Divergent, Insurgent, Allegiant”, p.39, Harper Collins